{"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","url":"https:\/\/automotivebypass.com\/products\/afm-dfm-vcm-disabler-pontiac-montana-montana-sv6-2006-2008-afm-dfm-disabler","provider":"Automotivebypass","version":"1.0","type":"link"}