{"title":"Pontiac Vehicle Products","description":"\u003cp\u003eBrowse vehicle-specific Pontiac automotive bypass modules for the applications currently listed in this collection. Products may cover auto start-stop, AFM\/DFM\/VCM, or TPMS systems depending on the vehicle.\u003c\/p\u003e\u003cp\u003eOpen each product to verify the exact model year, engine, trim, connector, and fitment notes before ordering.\u003c\/p\u003e","products":[{"product_id":"afm-dfm-vcm-disabler-pontiac-g6-2007-2009-afm-dfm-disabler","title":"Pontiac G6 2007-2009 3.9L V6 \/ 3.6L V6 AFM\/DFM Disabler","description":"\u003cp\u003eThis AFM\/DFM disabler plugs into the OBD-II port of the 2007 Pontiac G6, 2007 Pontiac G6 GTP and 2008–2009 Pontiac G6 GXP. Its job is to keep the engine running on all cylinders instead of dropping into the reduced-cylinder mode that GM's Active Fuel Management uses at light load. It does not rewrite engine software, and removal takes seconds: unplug the module and the vehicle is back to stock behavior.\u003c\/p\u003e\u003ch2\u003eVehicles, years and engines\u003c\/h2\u003e\u003cp\u003eEach row below is listed as a 100% fitment match:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e2007 Pontiac G6: 3.9L V6\u003c\/li\u003e\n\u003cli\u003e2007 Pontiac G6 GTP: 3.6L V6\u003c\/li\u003e\n\u003cli\u003e2008–2009 Pontiac G6 GXP: 3.6L V6\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eGM used several V6 families in these years. Before ordering, confirm from your RPO label or VIN that your engine is the one listed and that it is equipped with cylinder deactivation; if in doubt, send the VIN to support.\u003c\/p\u003e\u003ch2\u003eWhat AFM does on these engines\u003c\/h2\u003e\u003cp\u003eCylinder deactivation shuts off fuel and valve operation on part of the engine at light load, then brings those cylinders back when you need power. The engine computer decides when to switch based on load, speed and other inputs. This module works through the OBD-II port to keep the computer from choosing the reduced mode.\u003c\/p\u003e\u003ch2\u003eAfter installation\u003c\/h2\u003e\u003cp\u003eThe difference shows up in light-load driving: steady highway speeds, gentle acceleration and coasting down small grades. Those are the moments when AFM used to drop cylinders. With the module in, engine behavior there should feel the same as under heavier throttle. Full-throttle performance does not change, because AFM was never active at full throttle anyway.\u003c\/p\u003e\u003ch2\u003eOther ways owners disable AFM\u003c\/h2\u003e\u003cp\u003eOwners who want AFM gone for good sometimes go the mechanical route: non-AFM lifters, a matching camshaft and a retune. That is a large job and it is permanent. A tuner can also disable AFM in the engine computer. The plug-in module sits at the other end of the scale: no parts replaced, no software rewritten, and back to factory with one pull. It is meant for engines that run well and simply should not switch modes.\u003c\/p\u003e\u003ch2\u003eBefore installing\u003c\/h2\u003e\u003cp\u003eThis module prevents mode switching. It does not repair anything. If the engine already has a ticking lifter, misfire codes, low oil pressure or high oil consumption, have it diagnosed before relying on the module. Those symptoms need a mechanical repair, and keeping AFM off will not reverse damage that has already happened.\u003c\/p\u003e\u003ch2\u003eEngine care\u003c\/h2\u003e\u003cp\u003eOil level and quality are worth watching on any AFM engine, because the deactivation hardware is hydraulic. Check the dipstick at fuel stops on high-mileage engines, follow GM's specified oil grade, and address oil-pressure warnings immediately. None of that changes with the module installed.\u003c\/p\u003e\u003ch2\u003eWhy people turn AFM off\u003c\/h2\u003e\u003cp\u003eThe usual complaints are a drone or shudder in reduced-cylinder mode, a slight hesitation when the engine switches back, and a general wish to keep the valvetrain doing the same thing all the time. With the module installed, the engine stays in full-cylinder mode, so those transitions stop. Expect light-load fuel economy to be closer to an engine without AFM.\u003c\/p\u003e\u003ch2\u003eUsing it day to day\u003c\/h2\u003e\u003cp\u003eBecause it occupies the OBD-II port, unplug the module before connecting a scan tool, an insurance logger or an emissions-test probe, then plug it back in afterwards. Make sure it sits clear of your left knee and the pedals, and that the housing is fully seated in the port.\u003c\/p\u003e\u003ch2\u003eCheck before ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eYour model year, model and engine match a row in the table (2007 Pontiac G6, 2007 Pontiac G6 GTP and 2008–2009 Pontiac G6 GXP).\u003c\/li\u003e\n\u003cli\u003eFind your engine code. On GM vehicles before the 2018 model year, the Service Parts Identification label (usually inside the glovebox on these trucks and SUVs) lists the three-character RPO codes, and the engine code starts with L. From 2018, GM moved that data into a QR code on the certification label on the driver-side door pillar. The 8th character of the VIN also identifies the engine.\u003c\/li\u003e\n\u003cli\u003eThe engine runs cleanly with no stored misfire or AFM codes.\u003c\/li\u003e\n\u003cli\u003eIf the vehicle has an engine swap, an aftermarket tune or a replacement engine computer, contact support first.\u003c\/li\u003e\n\u003cli\u003eQuestions: support@automotivebypass.com with your VIN.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eYear-by-year fitment\u003c\/h2\u003e\u003cp\u003eThe full fitment data, by year, alongside matching AFM engine codes:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eAFM codes\u003c\/th\u003e\n\u003cth\u003eListing note\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2007\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eG6\u003c\/td\u003e\n\u003ctd\u003e3.9L V6\u003c\/td\u003e\n\u003ctd\u003eConfirm by VIN\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2007\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eG6 GTP\u003c\/td\u003e\n\u003ctd\u003e3.6L V6\u003c\/td\u003e\n\u003ctd\u003eConfirm by VIN\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eG6 GXP\u003c\/td\u003e\n\u003ctd\u003e3.6L V6\u003c\/td\u003e\n\u003ctd\u003eConfirm by VIN\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2009\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eG6 GXP\u003c\/td\u003e\n\u003ctd\u003e3.6L V6\u003c\/td\u003e\n\u003ctd\u003eConfirm by VIN\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eThe V6 question\u003c\/h2\u003e\u003cp\u003eGM built several 3.6L V6 versions, and only some have AFM. The LGX (2016-on Camaro) and the LGZ (2017-on Colorado and Canyon) both use direct injection, variable valve timing and Active Fuel Management, running on four cylinders at light load (cylinders 2 and 5 are shut down on the LGX). The LFX, used in the 2015–2016 Colorado and Canyon, and the LFY in the 2018 Traverse and Enclave do not have AFM. Your RPO code settles it.\u003c\/p\u003e\u003ch2\u003eWhere AFM came from\u003c\/h2\u003e\u003cp\u003eGM first sold cylinder deactivation in 1981 with the Cadillac V8-6-4. The modern system was announced in 2003 as Displacement on Demand and reached production on the 2005 Chevrolet TrailBlazer EXT and GMC Envoy XL and XUV with the 5.3L V8, followed by the 5.3L LS4 in the Impala SS, Monte Carlo SS and Pontiac Grand Prix GXP. Renamed Active Fuel Management, it spread across GM's Gen IV and EcoTec3 truck engines. For the 2019 Silverado, GM introduced Dynamic Fuel Management, based on Tula Technology's Dynamic Skip Fire, which can deactivate cylinders individually.\u003c\/p\u003e\u003ch2\u003eThe hardware behind AFM\u003c\/h2\u003e\u003cp\u003eAFM uses oil pressure as its control signal. A solenoid valve assembly under the intake manifold, in the valley cover, routes oil to collapsible lifters on the deactivating cylinders. Aerated or wrong-viscosity oil slows that signal. Keeping AFM off removes the switching, but every lifter still relies on the oiling system, so stick to the specified oil and intervals.\u003c\/p\u003e\u003ch2\u003eQuick definitions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eRPO code:\u003c\/strong\u003e GM's three-character option code; engine codes begin with L.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSPID label:\u003c\/strong\u003e Service Parts Identification label listing the RPO codes on pre-2018 GM vehicles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAFM:\u003c\/strong\u003e Active Fuel Management, GM's cylinder deactivation system on the engines covered here.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOBD-II port:\u003c\/strong\u003e The standard diagnostic connector under the dash on every US vehicle since 1996.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoD:\u003c\/strong\u003e Displacement on Demand, the original name for AFM.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eVIN 8th digit:\u003c\/strong\u003e The VIN character that identifies the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDFM:\u003c\/strong\u003e Dynamic Fuel Management, the system on 2019-on L84 and L87 engines that can deactivate cylinders individually.\u003c\/p\u003e\u003ch2\u003eTroubleshooting\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eA light comes on:\u003c\/strong\u003e Pull the module, read the code, and send it with your VIN to support.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eStill dropping cylinders:\u003c\/strong\u003e Check the module is pushed fully into the port and that your engine is AFM-equipped.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNeed the port for diagnostics:\u003c\/strong\u003e Remove the module first.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNoise or misfire persists:\u003c\/strong\u003e Have the engine inspected; the module only stops cylinder deactivation.\u003c\/p\u003e\u003ch2\u003ePreparation\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eClear up any warning lights first: the module is for a healthy engine.\u003c\/li\u003e\n\u003cli\u003eConfirm oil level and grade.\u003c\/li\u003e\n\u003cli\u003eTurn everything off.\u003c\/li\u003e\n\u003cli\u003ePlug the module into the OBD-II port.\u003c\/li\u003e\n\u003cli\u003eCheck it is fully seated and cannot be kicked loose.\u003c\/li\u003e\n\u003cli\u003eStart the engine.\u003c\/li\u003e\n\u003cli\u003eCruise lightly on a level road to confirm all cylinders stay active.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eDo I need to remove it for an emissions test or scan tool?\u003c\/h3\u003e\u003cp\u003eYes. It uses the diagnostic port, so unplug it while the port is needed and plug it back in afterwards.\u003c\/p\u003e\u003ch3\u003eDoes it plug into the OBD-II port on the Pontiac?\u003c\/h3\u003e\u003cp\u003eYes. It plugs into the OBD-II port under the dash. There is no wiring or splicing.\u003c\/p\u003e\u003ch3\u003eWhich Pontiac years and engines does it fit?\u003c\/h3\u003e\u003cp\u003eThe fitment table lists Pontiac G6 2007; Pontiac G6 GTP 2007; Pontiac G6 GXP 2008–2009 with 3.6L V6, 3.9L V6. Match your exact year and engine to a row before ordering.\u003c\/p\u003e\u003ch3\u003eHow do I tell which engine my Pontiac has?\u003c\/h3\u003e\u003cp\u003eCheck the 8th digit of the VIN or the RPO codes on the Service Parts Identification label (QR code on the door-pillar label on 2018 and newer GM models).\u003c\/p\u003e\u003ch3\u003eCan I go back to factory AFM?\u003c\/h3\u003e\u003cp\u003eYes. Unplug the module and the factory cylinder-deactivation strategy works again.\u003c\/p\u003e\u003ch3\u003eHow much fuel does AFM save?\u003c\/h3\u003e\u003cp\u003eEPA-test estimates published for GM's system are about 5.5–7.5%, with the benefit coming from light-load cruising. Keeping all cylinders active gives up part of that, depending on how you drive.\u003c\/p\u003e\u003ch3\u003eWill it add horsepower?\u003c\/h3\u003e\u003cp\u003eNo. It keeps all cylinders active; it does not change the engine tune.\u003c\/p\u003e\u003ch3\u003eWill it fix lifter noise or misfires?\u003c\/h3\u003e\u003cp\u003eNo. Those are mechanical or electrical faults that need their own diagnosis and repair.\u003c\/p\u003e\u003ch3\u003eDo I need it if my engine already has an AFM delete?\u003c\/h3\u003e\u003cp\u003eNo. An engine with the AFM hardware removed and a matching tune no longer deactivates cylinders, so the module has nothing to manage.\u003c\/p\u003e\u003ch3\u003eDoes it change anything when towing?\u003c\/h3\u003e\u003cp\u003eUnder heavy load, such as towing up a grade, AFM already keeps all cylinders running. The difference shows up during lighter cruising between climbs, where the engine no longer drops cylinders.\u003c\/p\u003e\u003ch3\u003eIs a tune or ECU reflash required?\u003c\/h3\u003e\u003cp\u003eNo. The module plugs into the OBD-II port and does not rewrite the engine computer's software.\u003c\/p\u003e\u003ch3\u003eDoes it work on 2019 and newer trucks with Dynamic Fuel Management?\u003c\/h3\u003e\u003cp\u003eOnly the vehicles and engines in this listing's fitment table are covered. DFM on the 2019-on Silverado 1500 and Sierra 1500 (5.3L L84, 6.2L L87) is a different system, so do not assume coverage outside the table.\u003c\/p\u003e\u003ch2\u003eShipping, returns and warranty\u003c\/h2\u003e\u003cp\u003eWe ship free within the contiguous United States (1–2 business days to dispatch, roughly 3–4 business days in transit). If it turns out to be the wrong part, request a return authorization within 45 days; returns carry a 20% restocking fee and return postage is on the buyer. Coverage is a 3-year limited warranty. Questions go to support@automotivebypass.com, weekdays 9 a.m. to 5 p.m. PST.\u003c\/p\u003e","brand":"Automotivebypass","offers":[{"title":"Default Title","offer_id":56493786857844,"sku":"RC-AFM-DFM-01-35","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1030\/8439\/2820\/files\/RC-AFM-DFM-01-35-1.jpg?v=1793172528"},{"product_id":"afm-dfm-vcm-disabler-pontiac-g8-gt-gxp-2008-2010-afm-dfm-disabler","title":"Pontiac G8 \/ G8 GT \/ G8 GXP 2008-2010 3.6L\/6.0L\/6.2L V6\/V8 AFM\/DFM Disabler","description":"\u003cp\u003eFits the 2008–2009 Pontiac G8, 2008–2009 Pontiac G8 GT and 2009–2010 Pontiac G8 GXP. The module connects at the OBD-II port and keeps GM's cylinder deactivation from switching on, which means steady all-cylinder operation instead of repeated changes between full and partial mode. It does not rewrite engine software, and removal takes seconds: unplug the module and the vehicle is back to stock behavior.\u003c\/p\u003e\u003ch2\u003eFitment by year and engine\u003c\/h2\u003e\u003cp\u003eListed applications, each a 100% fitment match:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e2008–2009 Pontiac G8: 3.6L V6\u003c\/li\u003e\n\u003cli\u003e2008–2009 Pontiac G8 GT: 6.0L V8\u003c\/li\u003e\n\u003cli\u003e2009–2010 Pontiac G8 GXP: 6.2L V8\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eGM engine codes with AFM that line up with these years and displacements:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eL76 (6.0L, 2008–2009, VIN 8th digit \"Y\")\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eAn engine code that is not listed here does not automatically rule the vehicle out, but send us the VIN first so we can check.\u003c\/p\u003e\u003ch2\u003eThe factory system in brief\u003c\/h2\u003e\u003cp\u003eGM's Active Fuel Management turns a V8 into a V4 at light load by deactivating cylinders 1, 7, 6 and 4. Solenoids route oil pressure to the lifters on those cylinders, which collapse and stop opening the valves. Fuel to those cylinders is cut at the same time. Press the throttle harder and the system brings all eight back.\u003c\/p\u003e\u003ch2\u003eBefore installing\u003c\/h2\u003e\u003cp\u003eThis module prevents mode switching. It does not repair anything. If the engine already has a ticking lifter, misfire codes, low oil pressure or high oil consumption, have it diagnosed before relying on the module. Those symptoms need a mechanical repair, and keeping AFM off will not reverse damage that has already happened.\u003c\/p\u003e\u003ch2\u003eOther ways owners disable AFM\u003c\/h2\u003e\u003cp\u003eA mechanical AFM delete swaps the deactivating lifters (and often the camshaft and lifter oil manifold) for non-AFM parts and requires a tune afterwards. A tune alone can switch AFM off in software. This module works through the OBD-II port instead, so the engine hardware and its calibration stay stock. That makes it the easiest option to reverse, and the right one only when the engine is mechanically healthy.\u003c\/p\u003e\u003ch2\u003eReasons to keep all cylinders running\u003c\/h2\u003e\u003cp\u003eA Pontiac with AFM switches modes many times on a typical drive. Some owners never notice; others feel it every time. If you are in the second group, or you tow and want steady behavior, keeping all cylinders active is the simplest answer. Fuel use at light cruise will usually rise a little, since that is where AFM saves fuel.\u003c\/p\u003e\u003ch2\u003eThe first drive\u003c\/h2\u003e\u003cp\u003eThe difference shows up in light-load driving: steady highway speeds, gentle acceleration and coasting down small grades. Those are the moments when AFM used to drop cylinders. With the module in, engine behavior there should feel the same as under heavier throttle. Full-throttle performance does not change, because AFM was never active at full throttle anyway.\u003c\/p\u003e\u003ch2\u003ePractical notes\u003c\/h2\u003e\u003cp\u003eThe module uses the OBD-II port, so it has to come out whenever a technician or an inspection station needs the port. Plugging it back in restores the all-cylinder mode. Route it so the driver cannot kick it loose.\u003c\/p\u003e\u003ch2\u003eOil and maintenance\u003c\/h2\u003e\u003cp\u003eDisabling cylinder deactivation does not replace normal maintenance. Use the oil grade and change interval GM lists for your engine, watch the oil level between changes, and repair leaks promptly. The valvetrain on these engines depends on clean oil at proper pressure in every mode.\u003c\/p\u003e\u003ch2\u003eConfirm your engine\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eYour model year, model and engine match a row in the table (2008–2009 Pontiac G8, 2008–2009 Pontiac G8 GT and 2009–2010 Pontiac G8 GXP).\u003c\/li\u003e\n\u003cli\u003eFind your engine code. On GM vehicles before the 2018 model year, the Service Parts Identification label (usually inside the glovebox on these trucks and SUVs) lists the three-character RPO codes, and the engine code starts with L. From 2018, GM moved that data into a QR code on the certification label on the driver-side door pillar. The 8th character of the VIN also identifies the engine.\u003c\/li\u003e\n\u003cli\u003eThe engine runs cleanly with no stored misfire or AFM codes.\u003c\/li\u003e\n\u003cli\u003eEngine swaps, custom tunes and replaced ECUs need a fitment check from support before ordering.\u003c\/li\u003e\n\u003cli\u003eQuestions: support@automotivebypass.com with your VIN.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eYear-by-year fitment\u003c\/h2\u003e\u003cp\u003eThe full fitment data, by year, alongside matching AFM engine codes:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eAFM codes\u003c\/th\u003e\n\u003cth\u003eListing note\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eG8\u003c\/td\u003e\n\u003ctd\u003e3.6L V6\u003c\/td\u003e\n\u003ctd\u003eConfirm by VIN\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2009\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eG8\u003c\/td\u003e\n\u003ctd\u003e3.6L V6\u003c\/td\u003e\n\u003ctd\u003eConfirm by VIN\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eG8 GT\u003c\/td\u003e\n\u003ctd\u003e6.0L V8\u003c\/td\u003e\n\u003ctd\u003eL76\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2009\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eG8 GT\u003c\/td\u003e\n\u003ctd\u003e6.0L V8\u003c\/td\u003e\n\u003ctd\u003eL76\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2009\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eG8 GXP\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003eConfirm by VIN\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2010\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eG8 GXP\u003c\/td\u003e\n\u003ctd\u003e6.2L V8\u003c\/td\u003e\n\u003ctd\u003eConfirm by VIN\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eThe engines behind the codes\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eL76\u003c\/strong\u003e: aluminum-block 6.0L V8 with rectangular-port heads; the 2007–2009 truck version also has variable valve timing. VIN engine digit \"Y\".\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eA short history of GM cylinder deactivation\u003c\/h2\u003e\u003cp\u003eCylinder deactivation at GM goes back to the 1981 Cadillac V8-6-4. The current approach began as Displacement on Demand, announced in 2003 for the 2005 TrailBlazer EXT, Envoy XL and Envoy XUV 5.3L, then the front-drive 5.3L LS4 cars. Under the Active Fuel Management name it became common on Gen IV and EcoTec3 truck V8s. The 2010 Camaro SS automatic got it on the L99. In 2019, Dynamic Fuel Management replaced it on the new Silverado and Sierra 1500 V8s.\u003c\/p\u003e\u003ch2\u003eWhich 3.6L V6 engines have AFM\u003c\/h2\u003e\u003cp\u003eGM built several 3.6L V6 versions, and only some have AFM. The LGX (2016-on Camaro) and the LGZ (2017-on Colorado and Canyon) both use direct injection, variable valve timing and Active Fuel Management, running on four cylinders at light load (cylinders 2 and 5 are shut down on the LGX). The LFX, used in the 2015–2016 Colorado and Canyon, and the LFY in the 2018 Traverse and Enclave do not have AFM. Your RPO code settles it.\u003c\/p\u003e\u003ch2\u003eEngine data at a glance\u003c\/h2\u003e\u003cp\u003eRatings and features for the engine codes that apply to this listing, as published for each engine (figures vary by vehicle and year):\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eRPO code\u003c\/th\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003cth\u003eTorque\u003c\/th\u003e\n\u003cth\u003eCompression\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eL76\u003c\/td\u003e\n\u003ctd\u003e6.0L\u003c\/td\u003e\n\u003ctd\u003e348–367 hp\u003c\/td\u003e\n\u003ctd\u003e376–385 lb-ft\u003c\/td\u003e\n\u003ctd\u003e10.40:1\u003c\/td\u003e\n\u003ctd\u003ealuminum block, AFM, VVT on truck versions\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eInstall prep checklist\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eClear up any warning lights first: the module is for a healthy engine.\u003c\/li\u003e\n\u003cli\u003eConfirm oil level and grade.\u003c\/li\u003e\n\u003cli\u003eTurn everything off.\u003c\/li\u003e\n\u003cli\u003ePlug the module into the OBD-II port.\u003c\/li\u003e\n\u003cli\u003eCheck it is fully seated and cannot be kicked loose.\u003c\/li\u003e\n\u003cli\u003eStart the engine.\u003c\/li\u003e\n\u003cli\u003eCruise lightly on a level road to confirm all cylinders stay active.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eThe hardware behind AFM\u003c\/h2\u003e\u003cp\u003eAn AFM engine has a solenoid valve assembly in the engine valley cover. Its solenoids send pressurized oil to special hydraulic roller lifters (supplied by Eaton and Delphi) on the deactivating cylinders, which then stop opening the valves. Because the system runs on oil pressure, oil quality matters: worn-out anti-foam additives, the wrong viscosity or overdue changes can delay the oil signal and upset the switching. The module stops the switching; the oil system still needs proper care.\u003c\/p\u003e\u003ch2\u003eGlossary\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDoD:\u003c\/strong\u003e Displacement on Demand, the original name for AFM.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRPO code:\u003c\/strong\u003e GM's three-character option code; engine codes begin with L.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOBD-II port:\u003c\/strong\u003e The standard diagnostic connector under the dash on every US vehicle since 1996.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eVIN 8th digit:\u003c\/strong\u003e The VIN character that identifies the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDFM:\u003c\/strong\u003e Dynamic Fuel Management, the system on 2019-on L84 and L87 engines that can deactivate cylinders individually.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSPID label:\u003c\/strong\u003e Service Parts Identification label listing the RPO codes on pre-2018 GM vehicles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAFM:\u003c\/strong\u003e Active Fuel Management, GM's cylinder deactivation system on the engines covered here.\u003c\/p\u003e\u003ch2\u003eIf something seems wrong\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eA light comes on:\u003c\/strong\u003e Pull the module, read the code, and send it with your VIN to support.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eStill dropping cylinders:\u003c\/strong\u003e Check the module is pushed fully into the port and that your engine is AFM-equipped.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNeed the port for diagnostics:\u003c\/strong\u003e Remove the module first.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNoise or misfire persists:\u003c\/strong\u003e Have the engine inspected; the module only stops cylinder deactivation.\u003c\/p\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003ch3\u003eCan I go back to factory AFM?\u003c\/h3\u003e\u003cp\u003eYes. Unplug the module and the factory cylinder-deactivation strategy works again.\u003c\/p\u003e\u003ch3\u003eWhich Pontiac years and engines does it fit?\u003c\/h3\u003e\u003cp\u003eThe fitment table lists Pontiac G8 2008–2009; Pontiac G8 GT 2008–2009; Pontiac G8 GXP 2009–2010 with 3.6L V6, 6.0L V8, 6.2L V8. Match your exact year and engine to a row before ordering.\u003c\/p\u003e\u003ch3\u003eWill it fix lifter noise or misfires?\u003c\/h3\u003e\u003cp\u003eNo. Those are mechanical or electrical faults that need their own diagnosis and repair.\u003c\/p\u003e\u003ch3\u003eWill it add horsepower?\u003c\/h3\u003e\u003cp\u003eNo. It keeps all cylinders active; it does not change the engine tune.\u003c\/p\u003e\u003ch3\u003eDoes it plug into the OBD-II port on the Pontiac?\u003c\/h3\u003e\u003cp\u003eYes. It plugs into the OBD-II port under the dash. There is no wiring or splicing.\u003c\/p\u003e\u003ch3\u003eDoes it work on 2019 and newer trucks with Dynamic Fuel Management?\u003c\/h3\u003e\u003cp\u003eOnly the vehicles and engines in this listing's fitment table are covered. DFM on the 2019-on Silverado 1500 and Sierra 1500 (5.3L L84, 6.2L L87) is a different system, so do not assume coverage outside the table.\u003c\/p\u003e\u003ch3\u003eDo I need it if my engine already has an AFM delete?\u003c\/h3\u003e\u003cp\u003eNo. An engine with the AFM hardware removed and a matching tune no longer deactivates cylinders, so the module has nothing to manage.\u003c\/p\u003e\u003ch3\u003eHow much fuel does AFM save?\u003c\/h3\u003e\u003cp\u003eEPA-test estimates published for GM's system are about 5.5–7.5%, with the benefit coming from light-load cruising. Keeping all cylinders active gives up part of that, depending on how you drive.\u003c\/p\u003e\u003ch3\u003eIs a tune or ECU reflash required?\u003c\/h3\u003e\u003cp\u003eNo. The module plugs into the OBD-II port and does not rewrite the engine computer's software.\u003c\/p\u003e\u003ch3\u003eDoes it change anything when towing?\u003c\/h3\u003e\u003cp\u003eUnder heavy load, such as towing up a grade, AFM already keeps all cylinders running. The difference shows up during lighter cruising between climbs, where the engine no longer drops cylinders.\u003c\/p\u003e\u003ch3\u003eDo I need to remove it for an emissions test or scan tool?\u003c\/h3\u003e\u003cp\u003eYes. It uses the diagnostic port, so unplug it while the port is needed and plug it back in afterwards.\u003c\/p\u003e\u003ch3\u003eHow do I tell which engine my Pontiac has?\u003c\/h3\u003e\u003cp\u003eCheck the 8th digit of the VIN or the RPO codes on the Service Parts Identification label (QR code on the door-pillar label on 2018 and newer GM models).\u003c\/p\u003e\u003ch2\u003eShipping, returns and warranty\u003c\/h2\u003e\u003cp\u003eWe ship free within the contiguous United States (1–2 business days to dispatch, roughly 3–4 business days in transit). If it turns out to be the wrong part, request a return authorization within 45 days; returns carry a 20% restocking fee and return postage is on the buyer. Coverage is a 3-year limited warranty. Questions go to support@automotivebypass.com, weekdays 9 a.m. to 5 p.m. PST.\u003c\/p\u003e","brand":"Automotivebypass","offers":[{"title":"Default Title","offer_id":56493786988916,"sku":"RC-AFM-DFM-01-36","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1030\/8439\/2820\/files\/RC-AFM-DFM-01-36-1.jpg?v=1793172535"},{"product_id":"afm-dfm-vcm-disabler-pontiac-grand-prix-2005-2008-afm-dfm-disabler","title":"Pontiac Grand Prix 2005-2008 3.9L\/5.3L V6\/V8 AFM\/DFM Disabler","description":"\u003cp\u003eThis AFM\/DFM disabler plugs into the OBD-II port of the 2005–2008 Pontiac Grand Prix. Its job is to keep the engine running on all cylinders instead of dropping into the reduced-cylinder mode that GM's Active Fuel Management uses at light load. No tools, no wiring and no reflash of the engine computer. Unplug it and AFM works again as it did from the factory.\u003c\/p\u003e\u003ch2\u003eWhat it fits\u003c\/h2\u003e\u003cp\u003eThe fitment table for this part (all rows marked 100% fitment match):\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e2005–2006 Pontiac Grand Prix: 5.3L V8\u003c\/li\u003e\n\u003cli\u003e2007 Pontiac Grand Prix: 5.3L V8 \/ 3.9L V6\u003c\/li\u003e\n\u003cli\u003e2008 Pontiac Grand Prix: 5.3L V8\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor reference, these are the AFM-equipped GM engine codes that match the years and displacements above:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eLS4 (5.3L, 2005–2009, VIN 8th digit \"C\")\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eIf your engine code is not in this list, email the VIN to support before ordering so we can confirm the application.\u003c\/p\u003e\u003ch2\u003eWhat AFM does on these engines\u003c\/h2\u003e\u003cp\u003eGM's Active Fuel Management turns a V8 into a V4 at light load by deactivating cylinders 1, 7, 6 and 4. Solenoids route oil pressure to the lifters on those cylinders, which collapse and stop opening the valves. Fuel to those cylinders is cut at the same time. Press the throttle harder and the system brings all eight back.\u003c\/p\u003e\u003ch2\u003eCheck the engine first\u003c\/h2\u003e\u003cp\u003eScan for stored codes before you plug it in. Misfire codes on the deactivation cylinders, an AFM solenoid circuit code, or a lifter noise are signs of an existing problem that should be repaired first. The module is meant for a healthy engine where you simply do not want cylinder deactivation.\u003c\/p\u003e\u003ch2\u003eWhat changes when you drive\u003c\/h2\u003e\u003cp\u003eThe difference shows up in light-load driving: steady highway speeds, gentle acceleration and coasting down small grades. Those are the moments when AFM used to drop cylinders. With the module in, engine behavior there should feel the same as under heavier throttle. Full-throttle performance does not change, because AFM was never active at full throttle anyway.\u003c\/p\u003e\u003ch2\u003ePlug-in module vs. a mechanical AFM delete\u003c\/h2\u003e\u003cp\u003eA mechanical AFM delete swaps the deactivating lifters (and often the camshaft and lifter oil manifold) for non-AFM parts and requires a tune afterwards. A tune alone can switch AFM off in software. This module works through the OBD-II port instead, so the engine hardware and its calibration stay stock. That makes it the easiest option to reverse, and the right one only when the engine is mechanically healthy.\u003c\/p\u003e\u003ch2\u003eKeep up with oil changes\u003c\/h2\u003e\u003cp\u003eDisabling cylinder deactivation does not replace normal maintenance. Use the oil grade and change interval GM lists for your engine, watch the oil level between changes, and repair leaks promptly. The valvetrain on these engines depends on clean oil at proper pressure in every mode.\u003c\/p\u003e\u003ch2\u003eUsing it day to day\u003c\/h2\u003e\u003cp\u003eThe module uses the OBD-II port, so it has to come out whenever a technician or an inspection station needs the port. Plugging it back in restores the all-cylinder mode. Route it so the driver cannot kick it loose.\u003c\/p\u003e\u003ch2\u003eWhy people turn AFM off\u003c\/h2\u003e\u003cp\u003eOwners usually disable AFM for one of three reasons: they notice the change between modes as a vibration or exhaust drone, they want a consistent throttle response while towing or climbing grades, or they want to limit how often the deactivation lifters switch. Keeping the engine on all cylinders addresses all three. The tradeoff is that you give up whatever fuel saving AFM was providing in light cruising.\u003c\/p\u003e\u003ch2\u003eConfirm your engine\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eYour model year, model and engine match a row in the table (2005–2008 Pontiac Grand Prix).\u003c\/li\u003e\n\u003cli\u003eFind your engine code. On GM vehicles before the 2018 model year, the Service Parts Identification label (usually inside the glovebox on these trucks and SUVs) lists the three-character RPO codes, and the engine code starts with L. From 2018, GM moved that data into a QR code on the certification label on the driver-side door pillar. The 8th character of the VIN also identifies the engine.\u003c\/li\u003e\n\u003cli\u003eNo check-engine light is on, and oil level and pressure are normal.\u003c\/li\u003e\n\u003cli\u003eEngine swaps, custom tunes and replaced ECUs need a fitment check from support before ordering.\u003c\/li\u003e\n\u003cli\u003eQuestions: support@automotivebypass.com with your VIN.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eYear-by-year fitment\u003c\/h2\u003e\u003cp\u003eEach model year from the fitment data, with the AFM engine codes GM used for that year and displacement:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eAFM codes\u003c\/th\u003e\n\u003cth\u003eListing note\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2005\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eGrand Prix\u003c\/td\u003e\n\u003ctd\u003e5.3L V8\u003c\/td\u003e\n\u003ctd\u003eLS4\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2006\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eGrand Prix\u003c\/td\u003e\n\u003ctd\u003e5.3L V8\u003c\/td\u003e\n\u003ctd\u003eLS4\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2007\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eGrand Prix\u003c\/td\u003e\n\u003ctd\u003e5.3L V8 \/ 3.9L V6\u003c\/td\u003e\n\u003ctd\u003eLS4\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eGrand Prix\u003c\/td\u003e\n\u003ctd\u003e5.3L V8\u003c\/td\u003e\n\u003ctd\u003eLS4\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eBefore you plug it in\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eScan the engine for stored codes and note any misfire or AFM solenoid codes.\u003c\/li\u003e\n\u003cli\u003eCheck the oil level and confirm the grade matches GM's specification for your engine.\u003c\/li\u003e\n\u003cli\u003eSwitch the ignition off before inserting the module.\u003c\/li\u003e\n\u003cli\u003eLocate the OBD-II port under the driver-side dash.\u003c\/li\u003e\n\u003cli\u003ePush the module in until it is fully seated and sits clear of your knee and the pedals.\u003c\/li\u003e\n\u003cli\u003eStart the engine and let it idle before driving.\u003c\/li\u003e\n\u003cli\u003eTake a drive at steady light throttle, where AFM used to engage, and confirm the engine stays on all cylinders.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eA short history of GM cylinder deactivation\u003c\/h2\u003e\u003cp\u003eGM first sold cylinder deactivation in 1981 with the Cadillac V8-6-4. The modern system was announced in 2003 as Displacement on Demand and reached production on the 2005 Chevrolet TrailBlazer EXT and GMC Envoy XL and XUV with the 5.3L V8, followed by the 5.3L LS4 in the Impala SS, Monte Carlo SS and Pontiac Grand Prix GXP. Renamed Active Fuel Management, it spread across GM's Gen IV and EcoTec3 truck engines. For the 2019 Silverado, GM introduced Dynamic Fuel Management, based on Tula Technology's Dynamic Skip Fire, which can deactivate cylinders individually.\u003c\/p\u003e\u003ch2\u003eQuick definitions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eVIN 8th digit:\u003c\/strong\u003e The VIN character that identifies the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOBD-II port:\u003c\/strong\u003e The standard diagnostic connector under the dash on every US vehicle since 1996.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAFM:\u003c\/strong\u003e Active Fuel Management, GM's cylinder deactivation system on the engines covered here.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoD:\u003c\/strong\u003e Displacement on Demand, the original name for AFM.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSPID label:\u003c\/strong\u003e Service Parts Identification label listing the RPO codes on pre-2018 GM vehicles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRPO code:\u003c\/strong\u003e GM's three-character option code; engine codes begin with L.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDFM:\u003c\/strong\u003e Dynamic Fuel Management, the system on 2019-on L84 and L87 engines that can deactivate cylinders individually.\u003c\/p\u003e\u003ch2\u003ePublished ratings for these engines\u003c\/h2\u003e\u003cp\u003eRatings and features for the engine codes that apply to this listing, as published for each engine (figures vary by vehicle and year):\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eRPO code\u003c\/th\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003cth\u003eTorque\u003c\/th\u003e\n\u003cth\u003eCompression\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eLS4\u003c\/td\u003e\n\u003ctd\u003e5.3L\u003c\/td\u003e\n\u003ctd\u003e300–303 hp\u003c\/td\u003e\n\u003ctd\u003e323 lb-ft\u003c\/td\u003e\n\u003ctd\u003e10.00:1\u003c\/td\u003e\n\u003ctd\u003ealuminum block, AFM, front-wheel drive\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eThe hardware behind AFM\u003c\/h2\u003e\u003cp\u003eAFM uses oil pressure as its control signal. A solenoid valve assembly under the intake manifold, in the valley cover, routes oil to collapsible lifters on the deactivating cylinders. Aerated or wrong-viscosity oil slows that signal. Keeping AFM off removes the switching, but every lifter still relies on the oiling system, so stick to the specified oil and intervals.\u003c\/p\u003e\u003ch2\u003eAbout these engine codes\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eLS4\u003c\/strong\u003e: 5.3L V8 mounted transversely in front-drive cars such as the Impala SS, Monte Carlo SS and Grand Prix GXP. VIN engine digit \"C\".\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eAfter-install checks\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWarning light appears:\u003c\/strong\u003e Remove the module, scan for codes and email support with the code and VIN.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMode changes still felt:\u003c\/strong\u003e Re-seat the module and confirm your engine code is on the AFM list for this listing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShop cannot reach the diagnostic port:\u003c\/strong\u003e Unplug the module for the visit and refit it afterwards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eLifter noise or misfire codes:\u003c\/strong\u003e These point to existing engine faults that need diagnosis and repair.\u003c\/p\u003e\u003ch2\u003eQuestions owners ask\u003c\/h2\u003e\u003ch3\u003eWill it fix lifter noise or misfires?\u003c\/h3\u003e\u003cp\u003eNo. Those are mechanical or electrical faults that need their own diagnosis and repair.\u003c\/p\u003e\u003ch3\u003eDoes it plug into the OBD-II port on the Pontiac Grand Prix?\u003c\/h3\u003e\u003cp\u003eYes. It plugs into the OBD-II port under the dash. There is no wiring or splicing.\u003c\/p\u003e\u003ch3\u003eWhich Pontiac Grand Prix years and engines does it fit?\u003c\/h3\u003e\u003cp\u003eThe fitment table lists Pontiac Grand Prix 2005–2008 with 3.9L V6, 5.3L V8. Match your exact year and engine to a row before ordering.\u003c\/p\u003e\u003ch3\u003eDo I need to remove it for an emissions test or scan tool?\u003c\/h3\u003e\u003cp\u003eYes. It uses the diagnostic port, so unplug it while the port is needed and plug it back in afterwards.\u003c\/p\u003e\u003ch3\u003eIs a tune or ECU reflash required?\u003c\/h3\u003e\u003cp\u003eNo. The module plugs into the OBD-II port and does not rewrite the engine computer's software.\u003c\/p\u003e\u003ch3\u003eDoes it change anything when towing?\u003c\/h3\u003e\u003cp\u003eUnder heavy load, such as towing up a grade, AFM already keeps all cylinders running. The difference shows up during lighter cruising between climbs, where the engine no longer drops cylinders.\u003c\/p\u003e\u003ch3\u003eDoes it work on 2019 and newer trucks with Dynamic Fuel Management?\u003c\/h3\u003e\u003cp\u003eOnly the vehicles and engines in this listing's fitment table are covered. DFM on the 2019-on Silverado 1500 and Sierra 1500 (5.3L L84, 6.2L L87) is a different system, so do not assume coverage outside the table.\u003c\/p\u003e\u003ch3\u003eHow do I tell which engine my Pontiac Grand Prix has?\u003c\/h3\u003e\u003cp\u003eCheck the 8th digit of the VIN or the RPO codes on the Service Parts Identification label (QR code on the door-pillar label on 2018 and newer GM models).\u003c\/p\u003e\u003ch3\u003eWill it add horsepower?\u003c\/h3\u003e\u003cp\u003eNo. It keeps all cylinders active; it does not change the engine tune.\u003c\/p\u003e\u003ch3\u003eCan I go back to factory AFM?\u003c\/h3\u003e\u003cp\u003eYes. Unplug the module and the factory cylinder-deactivation strategy works again.\u003c\/p\u003e\u003ch3\u003eHow much fuel does AFM save?\u003c\/h3\u003e\u003cp\u003eEPA-test estimates published for GM's system are about 5.5–7.5%, with the benefit coming from light-load cruising. Keeping all cylinders active gives up part of that, depending on how you drive.\u003c\/p\u003e\u003ch3\u003eDo I need it if my engine already has an AFM delete?\u003c\/h3\u003e\u003cp\u003eNo. An engine with the AFM hardware removed and a matching tune no longer deactivates cylinders, so the module has nothing to manage.\u003c\/p\u003e\u003ch2\u003eShipping and support\u003c\/h2\u003e\u003cp\u003eShipping is free to the contiguous US. Orders leave in 1–2 business days and usually arrive 3–4 business days later. Returns are accepted within 45 days with pre-approval; a 20% restocking fee applies and the buyer covers return shipping. The part carries a 3-year limited warranty, and support@automotivebypass.com answers Monday to Friday, 9–5 Pacific.\u003c\/p\u003e","brand":"Automotivebypass","offers":[{"title":"Default Title","offer_id":56493787021684,"sku":"RC-AFM-DFM-01-37","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1030\/8439\/2820\/files\/RC-AFM-DFM-01-37-1.jpg?v=1793172543"},{"product_id":"afm-dfm-vcm-disabler-pontiac-montana-montana-sv6-2006-2008-afm-dfm-disabler","title":"Pontiac Montana \/ Montana SV6 2006-2008 3.9L V6 AFM\/DFM Disabler","description":"\u003cp\u003eFits the 2006–2008 Pontiac Montana SV6 and 2007–2008 Pontiac Montana. The module connects at the OBD-II port and keeps GM's cylinder deactivation from switching on, which means steady all-cylinder operation instead of repeated changes between full and partial mode. There is no tune involved and nothing inside the engine is changed. Pull it out of the port and the factory strategy returns.\u003c\/p\u003e\u003ch2\u003eFitment by year and engine\u003c\/h2\u003e\u003cp\u003eThe fitment table for this part (all rows marked 100% fitment match):\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e2006–2008 Pontiac Montana SV6: 3.9L V6\u003c\/li\u003e\n\u003cli\u003e2007–2008 Pontiac Montana: 3.9L V6\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eConfirm that your exact engine is the one in the table and that it uses cylinder deactivation. The RPO label and the VIN engine digit are the reliable ways to check, and support can confirm from a VIN.\u003c\/p\u003e\u003ch2\u003eThe factory system in brief\u003c\/h2\u003e\u003cp\u003eCylinder deactivation shuts off fuel and valve operation on part of the engine at light load, then brings those cylinders back when you need power. The engine computer decides when to switch based on load, speed and other inputs. This module works through the OBD-II port to keep the computer from choosing the reduced mode.\u003c\/p\u003e\u003ch2\u003eWhat owners are after\u003c\/h2\u003e\u003cp\u003eA Pontiac Montana SV6 and Pontiac Montana with AFM switches modes many times on a typical drive. Some owners never notice; others feel it every time. If you are in the second group, or you tow and want steady behavior, keeping all cylinders active is the simplest answer. Fuel use at light cruise will usually rise a little, since that is where AFM saves fuel.\u003c\/p\u003e\u003ch2\u003eLiving with it\u003c\/h2\u003e\u003cp\u003eThe module uses the OBD-II port, so it has to come out whenever a technician or an inspection station needs the port. Plugging it back in restores the all-cylinder mode. Route it so the driver cannot kick it loose.\u003c\/p\u003e\u003ch2\u003eCheck the engine first\u003c\/h2\u003e\u003cp\u003eThis module prevents mode switching. It does not repair anything. If the engine already has a ticking lifter, misfire codes, low oil pressure or high oil consumption, have it diagnosed before relying on the module. Those symptoms need a mechanical repair, and keeping AFM off will not reverse damage that has already happened.\u003c\/p\u003e\u003ch2\u003eKeep up with oil changes\u003c\/h2\u003e\u003cp\u003eOil level and quality are worth watching on any AFM engine, because the deactivation hardware is hydraulic. Check the dipstick at fuel stops on high-mileage engines, follow GM's specified oil grade, and address oil-pressure warnings immediately. None of that changes with the module installed.\u003c\/p\u003e\u003ch2\u003eThe first drive\u003c\/h2\u003e\u003cp\u003eDrive at a steady cruise on a light throttle, where AFM used to switch modes. The engine should now stay on all cylinders, so the subtle shudder, drone or hesitation that came with each change should be gone. If your dash shows instant fuel economy, expect the light-cruise numbers to read a little lower than before, since that is exactly where cylinder deactivation saved fuel.\u003c\/p\u003e\u003ch2\u003eModule, tune or delete kit\u003c\/h2\u003e\u003cp\u003eA mechanical AFM delete swaps the deactivating lifters (and often the camshaft and lifter oil manifold) for non-AFM parts and requires a tune afterwards. A tune alone can switch AFM off in software. This module works through the OBD-II port instead, so the engine hardware and its calibration stay stock. That makes it the easiest option to reverse, and the right one only when the engine is mechanically healthy.\u003c\/p\u003e\u003ch2\u003eHow to confirm your engine code\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eYour model year, model and engine match a row in the table (2006–2008 Pontiac Montana SV6 and 2007–2008 Pontiac Montana).\u003c\/li\u003e\n\u003cli\u003eThe quickest checks are the 8th digit of your VIN, which identifies the engine, and the RPO list on the Service Parts Identification label (glovebox or trunk on most pre-2018 GM models, QR code on the driver-door pillar label from 2018).\u003c\/li\u003e\n\u003cli\u003eThe engine runs cleanly with no stored misfire or AFM codes.\u003c\/li\u003e\n\u003cli\u003eEngine swaps, custom tunes and replaced ECUs need a fitment check from support before ordering.\u003c\/li\u003e\n\u003cli\u003eQuestions: support@automotivebypass.com with your VIN.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eEvery listed year and engine\u003c\/h2\u003e\u003cp\u003eThe full fitment data, by year, alongside matching AFM engine codes:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eAFM codes\u003c\/th\u003e\n\u003cth\u003eListing note\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2007\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eMontana\u003c\/td\u003e\n\u003ctd\u003e3.9L V6\u003c\/td\u003e\n\u003ctd\u003eConfirm by VIN\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eMontana\u003c\/td\u003e\n\u003ctd\u003e3.9L V6\u003c\/td\u003e\n\u003ctd\u003eConfirm by VIN\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2006\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eMontana SV6\u003c\/td\u003e\n\u003ctd\u003e3.9L V6\u003c\/td\u003e\n\u003ctd\u003eConfirm by VIN\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2007\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eMontana SV6\u003c\/td\u003e\n\u003ctd\u003e3.9L V6\u003c\/td\u003e\n\u003ctd\u003eConfirm by VIN\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eMontana SV6\u003c\/td\u003e\n\u003ctd\u003e3.9L V6\u003c\/td\u003e\n\u003ctd\u003eConfirm by VIN\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eQuick definitions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eRPO code:\u003c\/strong\u003e GM's three-character option code; engine codes begin with L.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDFM:\u003c\/strong\u003e Dynamic Fuel Management, the system on 2019-on L84 and L87 engines that can deactivate cylinders individually.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoD:\u003c\/strong\u003e Displacement on Demand, the original name for AFM.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eVIN 8th digit:\u003c\/strong\u003e The VIN character that identifies the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOBD-II port:\u003c\/strong\u003e The standard diagnostic connector under the dash on every US vehicle since 1996.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSPID label:\u003c\/strong\u003e Service Parts Identification label listing the RPO codes on pre-2018 GM vehicles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAFM:\u003c\/strong\u003e Active Fuel Management, GM's cylinder deactivation system on the engines covered here.\u003c\/p\u003e\u003ch2\u003eWhat is inside an AFM engine\u003c\/h2\u003e\u003cp\u003eAFM uses oil pressure as its control signal. A solenoid valve assembly under the intake manifold, in the valley cover, routes oil to collapsible lifters on the deactivating cylinders. Aerated or wrong-viscosity oil slows that signal. Keeping AFM off removes the switching, but every lifter still relies on the oiling system, so stick to the specified oil and intervals.\u003c\/p\u003e\u003ch2\u003ePreparation\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRead codes first; repair existing misfire or lifter faults before relying on the module.\u003c\/li\u003e\n\u003cli\u003eTop up the oil to the full mark with the correct grade.\u003c\/li\u003e\n\u003cli\u003eIgnition off.\u003c\/li\u003e\n\u003cli\u003eFind the OBD-II port under the dash.\u003c\/li\u003e\n\u003cli\u003eSeat the module fully and keep it away from the pedals.\u003c\/li\u003e\n\u003cli\u003eStart the engine.\u003c\/li\u003e\n\u003cli\u003eTest at light cruise and check that the reduced-cylinder mode no longer appears.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eA short history of GM cylinder deactivation\u003c\/h2\u003e\u003cp\u003eGM's first attempt was the 1981 Cadillac V8-6-4. Displacement on Demand followed in the 2005 model year on the 5.3L TrailBlazer EXT and Envoy XL\/XUV and on LS4-powered front-drive cars, and was renamed Active Fuel Management as it moved into the full-size trucks and SUVs. Dynamic Fuel Management, developed from Tula Technology's Dynamic Skip Fire, took over on the 2019 Silverado 1500 and Sierra 1500 V8s.\u003c\/p\u003e\u003ch2\u003eIf something seems wrong\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWarning light appears:\u003c\/strong\u003e Remove the module, scan for codes and email support with the code and VIN.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMode changes still felt:\u003c\/strong\u003e Re-seat the module and confirm your engine code is on the AFM list for this listing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShop cannot reach the diagnostic port:\u003c\/strong\u003e Unplug the module for the visit and refit it afterwards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eLifter noise or misfire codes:\u003c\/strong\u003e These point to existing engine faults that need diagnosis and repair.\u003c\/p\u003e\u003ch2\u003eCommon questions\u003c\/h2\u003e\u003ch3\u003eDo I need to remove it for an emissions test or scan tool?\u003c\/h3\u003e\u003cp\u003eYes. It uses the diagnostic port, so unplug it while the port is needed and plug it back in afterwards.\u003c\/p\u003e\u003ch3\u003eWill it fix lifter noise or misfires?\u003c\/h3\u003e\u003cp\u003eNo. Those are mechanical or electrical faults that need their own diagnosis and repair.\u003c\/p\u003e\u003ch3\u003eWhich Pontiac Montana SV6 and Pontiac Montana years and engines does it fit?\u003c\/h3\u003e\u003cp\u003eThe fitment table lists Pontiac Montana SV6 2006–2008; Pontiac Montana 2007–2008 with 3.9L V6. Match your exact year and engine to a row before ordering.\u003c\/p\u003e\u003ch3\u003eCan I go back to factory AFM?\u003c\/h3\u003e\u003cp\u003eYes. Unplug the module and the factory cylinder-deactivation strategy works again.\u003c\/p\u003e\u003ch3\u003eDoes it plug into the OBD-II port on the Pontiac Montana SV6 and Pontiac Montana?\u003c\/h3\u003e\u003cp\u003eYes. It plugs into the OBD-II port under the dash. There is no wiring or splicing.\u003c\/p\u003e\u003ch3\u003eHow much fuel does AFM save?\u003c\/h3\u003e\u003cp\u003eEPA-test estimates published for GM's system are about 5.5–7.5%, with the benefit coming from light-load cruising. Keeping all cylinders active gives up part of that, depending on how you drive.\u003c\/p\u003e\u003ch3\u003eHow do I tell which engine my Pontiac Montana SV6 and Pontiac Montana has?\u003c\/h3\u003e\u003cp\u003eCheck the 8th digit of the VIN or the RPO codes on the Service Parts Identification label (QR code on the door-pillar label on 2018 and newer GM models).\u003c\/p\u003e\u003ch3\u003eWill it add horsepower?\u003c\/h3\u003e\u003cp\u003eNo. It keeps all cylinders active; it does not change the engine tune.\u003c\/p\u003e\u003ch3\u003eIs a tune or ECU reflash required?\u003c\/h3\u003e\u003cp\u003eNo. The module plugs into the OBD-II port and does not rewrite the engine computer's software.\u003c\/p\u003e\u003ch3\u003eDoes it work on 2019 and newer trucks with Dynamic Fuel Management?\u003c\/h3\u003e\u003cp\u003eOnly the vehicles and engines in this listing's fitment table are covered. DFM on the 2019-on Silverado 1500 and Sierra 1500 (5.3L L84, 6.2L L87) is a different system, so do not assume coverage outside the table.\u003c\/p\u003e\u003ch3\u003eDoes it change anything when towing?\u003c\/h3\u003e\u003cp\u003eUnder heavy load, such as towing up a grade, AFM already keeps all cylinders running. The difference shows up during lighter cruising between climbs, where the engine no longer drops cylinders.\u003c\/p\u003e\u003ch3\u003eDo I need it if my engine already has an AFM delete?\u003c\/h3\u003e\u003cp\u003eNo. An engine with the AFM hardware removed and a matching tune no longer deactivates cylinders, so the module has nothing to manage.\u003c\/p\u003e\u003ch2\u003eShipping, returns and warranty\u003c\/h2\u003e\u003cp\u003eStandard shipping inside the lower 48 states costs nothing; allow 1–2 business days of handling plus 3–4 in transit. Returns need approval first and must be requested within 45 days. Approved returns are subject to a 20% restocking fee, with return shipping paid by the customer. A 3-year limited warranty applies. Email support@automotivebypass.com (Mon–Fri, 9–5 PST) with your VIN if you want a fitment check.\u003c\/p\u003e","brand":"Automotivebypass","offers":[{"title":"Default Title","offer_id":56493787054452,"sku":"RC-AFM-DFM-01-38","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1030\/8439\/2820\/files\/RC-AFM-DFM-01-38-1.jpg?v=1793172553"},{"product_id":"afm-dfm-vcm-disabler-pontiac-torrent-gxp-2008-2009-afm-dfm-disabler","title":"Pontiac Torrent GXP 2008-2009 3.6L V6 AFM\/DFM Disabler","description":"\u003cp\u003eThis AFM\/DFM disabler plugs into the OBD-II port of the 2008–2009 Pontiac Torrent GXP. Its job is to keep the engine running on all cylinders instead of dropping into the reduced-cylinder mode that GM's Active Fuel Management uses at light load. There is no tune involved and nothing inside the engine is changed. Pull it out of the port and the factory strategy returns.\u003c\/p\u003e\u003ch2\u003eCovered applications\u003c\/h2\u003e\u003cp\u003eListed applications, each a 100% fitment match:\u003c\/p\u003e\u003cul\u003e\u003cli\u003e2008–2009 Pontiac Torrent GXP: 3.6L V6\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eConfirm that your exact engine is the one in the table and that it uses cylinder deactivation. The RPO label and the VIN engine digit are the reliable ways to check, and support can confirm from a VIN.\u003c\/p\u003e\u003ch2\u003eWhat AFM does on these engines\u003c\/h2\u003e\u003cp\u003eGM's cylinder deactivation saves fuel by running the engine on fewer cylinders during light-load cruising. The switch is controlled by the engine computer. The module talks to the vehicle through the OBD-II port and keeps that reduced-cylinder mode from being selected, so all cylinders stay active.\u003c\/p\u003e\u003ch2\u003eWhy owners disable it\u003c\/h2\u003e\u003cp\u003eA Pontiac Torrent GXP with AFM switches modes many times on a typical drive. Some owners never notice; others feel it every time. If you are in the second group, or you tow and want steady behavior, keeping all cylinders active is the simplest answer. Fuel use at light cruise will usually rise a little, since that is where AFM saves fuel.\u003c\/p\u003e\u003ch2\u003eLiving with it\u003c\/h2\u003e\u003cp\u003eLeave it in the port for everyday driving. When the vehicle goes in for service or an emissions check, remove it so the shop has normal access to the diagnostic connector, then reinstall it.\u003c\/p\u003e\u003ch2\u003eOil and maintenance\u003c\/h2\u003e\u003cp\u003eAFM lifters and the solenoids that control them run on engine oil pressure. Keeping the oil at the right level, using the grade GM specifies on the oil filler cap or in the owner's manual, and changing it on schedule matters whether or not AFM is active. The module changes when cylinders deactivate; it does not change the oiling system.\u003c\/p\u003e\u003ch2\u003eModule, tune or delete kit\u003c\/h2\u003e\u003cp\u003eOwners who want AFM gone for good sometimes go the mechanical route: non-AFM lifters, a matching camshaft and a retune. That is a large job and it is permanent. A tuner can also disable AFM in the engine computer. The plug-in module sits at the other end of the scale: no parts replaced, no software rewritten, and back to factory with one pull. It is meant for engines that run well and simply should not switch modes.\u003c\/p\u003e\u003ch2\u003eWhat to expect on the road\u003c\/h2\u003e\u003cp\u003eThe difference shows up in light-load driving: steady highway speeds, gentle acceleration and coasting down small grades. Those are the moments when AFM used to drop cylinders. With the module in, engine behavior there should feel the same as under heavier throttle. Full-throttle performance does not change, because AFM was never active at full throttle anyway.\u003c\/p\u003e\u003ch2\u003eIf the engine already has symptoms\u003c\/h2\u003e\u003cp\u003eKeep the oil at the correct level and grade before and after installation. AFM lifters and their solenoids are oil-pressure operated, so an engine that is low on oil or running the wrong grade should be sorted out first. The module stops the switching, but it is not a substitute for maintenance or for repairing an engine that already has a fault.\u003c\/p\u003e\u003ch2\u003eHow to confirm your engine code\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eYour model year, model and engine match a row in the table (2008–2009 Pontiac Torrent GXP).\u003c\/li\u003e\n\u003cli\u003eThe quickest checks are the 8th digit of your VIN, which identifies the engine, and the RPO list on the Service Parts Identification label (glovebox or trunk on most pre-2018 GM models, QR code on the driver-door pillar label from 2018).\u003c\/li\u003e\n\u003cli\u003eThe engine runs cleanly with no stored misfire or AFM codes.\u003c\/li\u003e\n\u003cli\u003eEngine swaps, custom tunes and replaced ECUs need a fitment check from support before ordering.\u003c\/li\u003e\n\u003cli\u003eQuestions: support@automotivebypass.com with your VIN.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment table with engine codes\u003c\/h2\u003e\u003cp\u003eThe full fitment data, by year, alongside matching AFM engine codes:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eAFM codes\u003c\/th\u003e\n\u003cth\u003eListing note\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eTorrent GXP\u003c\/td\u003e\n\u003ctd\u003e3.6L V6\u003c\/td\u003e\n\u003ctd\u003eConfirm by VIN\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2009\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eTorrent GXP\u003c\/td\u003e\n\u003ctd\u003e3.6L V6\u003c\/td\u003e\n\u003ctd\u003eConfirm by VIN\u003c\/td\u003e\n\u003ctd\u003e100% Fitment Match | OEM-Grade Quality | Plug \u0026amp; Play\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eInstall prep checklist\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eScan the engine for stored codes and note any misfire or AFM solenoid codes.\u003c\/li\u003e\n\u003cli\u003eCheck the oil level and confirm the grade matches GM's specification for your engine.\u003c\/li\u003e\n\u003cli\u003eSwitch the ignition off before inserting the module.\u003c\/li\u003e\n\u003cli\u003eLocate the OBD-II port under the driver-side dash.\u003c\/li\u003e\n\u003cli\u003ePush the module in until it is fully seated and sits clear of your knee and the pedals.\u003c\/li\u003e\n\u003cli\u003eStart the engine and let it idle before driving.\u003c\/li\u003e\n\u003cli\u003eTake a drive at steady light throttle, where AFM used to engage, and confirm the engine stays on all cylinders.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrom Displacement on Demand to DFM\u003c\/h2\u003e\u003cp\u003eCylinder deactivation at GM goes back to the 1981 Cadillac V8-6-4. The current approach began as Displacement on Demand, announced in 2003 for the 2005 TrailBlazer EXT, Envoy XL and Envoy XUV 5.3L, then the front-drive 5.3L LS4 cars. Under the Active Fuel Management name it became common on Gen IV and EcoTec3 truck V8s. The 2010 Camaro SS automatic got it on the L99. In 2019, Dynamic Fuel Management replaced it on the new Silverado and Sierra 1500 V8s.\u003c\/p\u003e\u003ch2\u003eWhy oil matters on these engines\u003c\/h2\u003e\u003cp\u003eAFM uses oil pressure as its control signal. A solenoid valve assembly under the intake manifold, in the valley cover, routes oil to collapsible lifters on the deactivating cylinders. Aerated or wrong-viscosity oil slows that signal. Keeping AFM off removes the switching, but every lifter still relies on the oiling system, so stick to the specified oil and intervals.\u003c\/p\u003e\u003ch2\u003eTroubleshooting\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWarning light appears:\u003c\/strong\u003e Remove the module, scan for codes and email support with the code and VIN.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMode changes still felt:\u003c\/strong\u003e Re-seat the module and confirm your engine code is on the AFM list for this listing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShop cannot reach the diagnostic port:\u003c\/strong\u003e Unplug the module for the visit and refit it afterwards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eLifter noise or misfire codes:\u003c\/strong\u003e These point to existing engine faults that need diagnosis and repair.\u003c\/p\u003e\u003ch2\u003eGlossary\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eRPO code:\u003c\/strong\u003e GM's three-character option code; engine codes begin with L.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOBD-II port:\u003c\/strong\u003e The standard diagnostic connector under the dash on every US vehicle since 1996.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDFM:\u003c\/strong\u003e Dynamic Fuel Management, the system on 2019-on L84 and L87 engines that can deactivate cylinders individually.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAFM:\u003c\/strong\u003e Active Fuel Management, GM's cylinder deactivation system on the engines covered here.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSPID label:\u003c\/strong\u003e Service Parts Identification label listing the RPO codes on pre-2018 GM vehicles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eVIN 8th digit:\u003c\/strong\u003e The VIN character that identifies the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoD:\u003c\/strong\u003e Displacement on Demand, the original name for AFM.\u003c\/p\u003e\u003ch2\u003eGM 3.6L V6 engines and AFM\u003c\/h2\u003e\u003cp\u003eFor V6 applications, the engine code matters more than the displacement. AFM is part of the LGX (2016-on Camaro, which drops cylinders 2 and 5) and the LGZ (2017-on Colorado and Canyon). The LFX that preceded them, including in the 2015–2016 Colorado and Canyon, and the LFY in the 2018 Traverse and Enclave run on all six cylinders all the time and are not candidates for this module.\u003c\/p\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003ch3\u003eWill it add horsepower?\u003c\/h3\u003e\u003cp\u003eNo. It keeps all cylinders active; it does not change the engine tune.\u003c\/p\u003e\u003ch3\u003eWill it fix lifter noise or misfires?\u003c\/h3\u003e\u003cp\u003eNo. Those are mechanical or electrical faults that need their own diagnosis and repair.\u003c\/p\u003e\u003ch3\u003eWhich Pontiac Torrent GXP years and engines does it fit?\u003c\/h3\u003e\u003cp\u003eThe fitment table lists Pontiac Torrent GXP 2008–2009 with 3.6L V6. Match your exact year and engine to a row before ordering.\u003c\/p\u003e\u003ch3\u003eDoes it plug into the OBD-II port on the Pontiac Torrent GXP?\u003c\/h3\u003e\u003cp\u003eYes. It plugs into the OBD-II port under the dash. There is no wiring or splicing.\u003c\/p\u003e\u003ch3\u003eDo I need it if my engine already has an AFM delete?\u003c\/h3\u003e\u003cp\u003eNo. An engine with the AFM hardware removed and a matching tune no longer deactivates cylinders, so the module has nothing to manage.\u003c\/p\u003e\u003ch3\u003eDoes it change anything when towing?\u003c\/h3\u003e\u003cp\u003eUnder heavy load, such as towing up a grade, AFM already keeps all cylinders running. The difference shows up during lighter cruising between climbs, where the engine no longer drops cylinders.\u003c\/p\u003e\u003ch3\u003eCan I go back to factory AFM?\u003c\/h3\u003e\u003cp\u003eYes. Unplug the module and the factory cylinder-deactivation strategy works again.\u003c\/p\u003e\u003ch3\u003eHow much fuel does AFM save?\u003c\/h3\u003e\u003cp\u003eEPA-test estimates published for GM's system are about 5.5–7.5%, with the benefit coming from light-load cruising. Keeping all cylinders active gives up part of that, depending on how you drive.\u003c\/p\u003e\u003ch3\u003eDo I need to remove it for an emissions test or scan tool?\u003c\/h3\u003e\u003cp\u003eYes. It uses the diagnostic port, so unplug it while the port is needed and plug it back in afterwards.\u003c\/p\u003e\u003ch3\u003eDoes it work on 2019 and newer trucks with Dynamic Fuel Management?\u003c\/h3\u003e\u003cp\u003eOnly the vehicles and engines in this listing's fitment table are covered. DFM on the 2019-on Silverado 1500 and Sierra 1500 (5.3L L84, 6.2L L87) is a different system, so do not assume coverage outside the table.\u003c\/p\u003e\u003ch3\u003eHow do I tell which engine my Pontiac Torrent GXP has?\u003c\/h3\u003e\u003cp\u003eCheck the 8th digit of the VIN or the RPO codes on the Service Parts Identification label (QR code on the door-pillar label on 2018 and newer GM models).\u003c\/p\u003e\u003ch3\u003eIs a tune or ECU reflash required?\u003c\/h3\u003e\u003cp\u003eNo. The module plugs into the OBD-II port and does not rewrite the engine computer's software.\u003c\/p\u003e\u003ch2\u003eWarranty and returns\u003c\/h2\u003e\u003cp\u003eStandard shipping inside the lower 48 states costs nothing; allow 1–2 business days of handling plus 3–4 in transit. Returns need approval first and must be requested within 45 days. Approved returns are subject to a 20% restocking fee, with return shipping paid by the customer. A 3-year limited warranty applies. Email support@automotivebypass.com (Mon–Fri, 9–5 PST) with your VIN if you want a fitment check.\u003c\/p\u003e","brand":"Automotivebypass","offers":[{"title":"Default Title","offer_id":56493787087220,"sku":"RC-AFM-DFM-01-39","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1030\/8439\/2820\/files\/RC-AFM-DFM-01-39-1.jpg?v=1793172561"}],"url":"https:\/\/automotivebypass.com\/collections\/pontiac-vehicle-products.oembed","provider":"Automotivebypass","version":"1.0","type":"link"}