{"product_id":"afm-dfm-vcm-disabler-gmc-sierra-1500-2007-2018-afm-dfm-disabler","title":"GMC Sierra 1500 2007-2018 4.3L\/5.3L\/6.0L\/6.2L V6\/V8 AFM\/DFM Disabler","description":"\u003cp\u003eThis AFM\/DFM disabler plugs into the OBD-II port of the 2007–2018 GMC Sierra 1500. 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\u003eFitment by year and engine\u003c\/h2\u003e\u003cp\u003eListed applications, each a 100% fitment match:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e2007–2009 GMC Sierra 1500: 5.3L V8 \/ 6.0L V8\u003c\/li\u003e\n\u003cli\u003e2010–2013 GMC Sierra 1500: 5.3L V8 \/ 6.0L V8 \/ 6.2L V8\u003c\/li\u003e\n\u003cli\u003e2014 GMC Sierra 1500: 4.3L V6 \/ 5.3L V8 \/ 6.0L V8 \/ 6.2L V8\u003c\/li\u003e\n\u003cli\u003e2015–2017 GMC Sierra 1500: 4.3L V6 \/ 5.3L V8 \/ 6.2L V8\u003c\/li\u003e\n\u003cli\u003e2018 GMC Sierra 1500: 4.3L V6 \/ 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\n\u003cli\u003eLY5 (5.3L, 2007–2009, VIN 8th digit \"J\")\u003c\/li\u003e\n\u003cli\u003eLC9 (5.3L, 2007–2011, VIN 8th digit \"3\")\u003c\/li\u003e\n\u003cli\u003eLMG (5.3L, 2007–2014, VIN 8th digit \"0\")\u003c\/li\u003e\n\u003cli\u003eL76 (6.0L, 2007–2009, VIN 8th digit \"Y\")\u003c\/li\u003e\n\u003cli\u003eLFA (6.0L, 2008–2009, VIN 8th digit \"5\")\u003c\/li\u003e\n\u003cli\u003eLZ1 (6.0L, 2010–2013, VIN 8th digit \"J\")\u003c\/li\u003e\n\u003cli\u003eLV3 (4.3L, 2014–2018)\u003c\/li\u003e\n\u003cli\u003eL83 (5.3L, 2014–2018, VIN 8th digit \"C\")\u003c\/li\u003e\n\u003cli\u003eL86 (6.2L, 2014–2018, VIN 8th digit \"J\")\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIn the same trucks and SUVs, GM also built V8s without AFM, for example the 5.3L LH9 (2010–2012 trucks, VIN code P), the 6.0L LY6 and L96 and the 6.2L L9H. Those engines never deactivate cylinders, so the module has nothing to manage on them. Check your code against both lists before you buy.\u003c\/p\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\u003cp\u003eGM's 4.3L V6 (RPO LV3) uses the same idea on two cylinders: cylinders 3 and 6 are deactivated at light load, so the engine runs on four. On V8s, AFM drops cylinders 1, 7, 6 and 4. In both cases oil-pressure solenoids switch special lifters into a collapsed state and fuel to those cylinders is cut.\u003c\/p\u003e\u003cp\u003eFor the 2019 redesign of the Silverado 1500 and Sierra 1500, GM introduced Dynamic Fuel Management on the 5.3L L84 and 6.2L L87, which can run on 17 different cylinder patterns. That is a different system from the AFM covered by this listing.\u003c\/p\u003e\u003ch2\u003eEngine care\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\u003eReasons to keep all cylinders running\u003c\/h2\u003e\u003cp\u003eMany drivers would rather have predictable response than the small economy gain from running on fewer cylinders, especially when towing, hauling or driving in hills. Keeping AFM off removes the mode changes entirely. It does not add horsepower, and it is not a fix for an engine that already has lifter or oil-consumption problems.\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\u003eWhat changes when you 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\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\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 (2007–2018 GMC Sierra 1500).\u003c\/li\u003e\n\u003cli\u003eLook up the engine RPO code. Older GM vehicles print it on the Service Parts Identification sticker, often in the glovebox; 2018 and newer GM models carry it in a QR code on the driver-side B-pillar label. You can also read the 8th digit of the VIN, which is the engine code.\u003c\/li\u003e\n\u003cli\u003eNo check-engine light is on, and oil level and pressure are normal.\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\u003eEvery listed year and engine\u003c\/h2\u003e\u003cp\u003eOne row per year. The last column shows which AFM-equipped GM engine codes match that year and engine size:\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\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003e5.3L V8 \/ 6.0L V8\u003c\/td\u003e\n\u003ctd\u003eLY5, LC9, LMG, L76\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\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003e5.3L V8 \/ 6.0L V8\u003c\/td\u003e\n\u003ctd\u003eLY5, LC9, LMG, L76, LFA\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\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003e5.3L V8 \/ 6.0L V8\u003c\/td\u003e\n\u003ctd\u003eLY5, LC9, LMG, L76, LFA\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\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003e5.3L V8 \/ 6.0L V8 \/ 6.2L V8\u003c\/td\u003e\n\u003ctd\u003eLC9, LMG, LZ1\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\u003e2011\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003e5.3L V8 \/ 6.0L V8 \/ 6.2L V8\u003c\/td\u003e\n\u003ctd\u003eLC9, LMG, LZ1\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\u003e2012\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003e5.3L V8 \/ 6.0L V8 \/ 6.2L V8\u003c\/td\u003e\n\u003ctd\u003eLMG, LZ1\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\u003e2013\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003e5.3L V8 \/ 6.0L V8 \/ 6.2L V8\u003c\/td\u003e\n\u003ctd\u003eLMG, LZ1\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\u003e2014\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003e4.3L V6 \/ 5.3L V8 \/ 6.0L V8 \/ 6.2L V8\u003c\/td\u003e\n\u003ctd\u003eLV3, LMG, L83, L86\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\u003e2015\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003e4.3L V6 \/ 5.3L V8 \/ 6.2L V8\u003c\/td\u003e\n\u003ctd\u003eLV3, L83, L86\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\u003e2016\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003e4.3L V6 \/ 5.3L V8 \/ 6.2L V8\u003c\/td\u003e\n\u003ctd\u003eLV3, L83, L86\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\u003e2017\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003e4.3L V6 \/ 5.3L V8 \/ 6.2L V8\u003c\/td\u003e\n\u003ctd\u003eLV3, L83, L86\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\u003e2018\u003c\/td\u003e\n\u003ctd\u003eGMC\u003c\/td\u003e\n\u003ctd\u003eSierra 1500\u003c\/td\u003e\n\u003ctd\u003e4.3L V6 \/ 5.3L V8\u003c\/td\u003e\n\u003ctd\u003eLV3, L83\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\u003eEngine code notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLY5\u003c\/strong\u003e: iron-block 5.3L Vortec used in 2007–2009 trucks and SUVs, without variable valve timing or flex-fuel capability. VIN engine digit \"J\".\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLC9\u003c\/strong\u003e: aluminum-block 5.3L flex-fuel (E85-capable) truck and SUV engine, with variable valve timing added from 2010. VIN engine digit \"3\".\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLMG\u003c\/strong\u003e: 5.3L flex-fuel truck and SUV engine, with variable valve timing from 2010. VIN engine digit \"0\".\u003c\/li\u003e\n\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\n\u003cli\u003e\n\u003cstrong\u003eLFA\u003c\/strong\u003e: 6.0L V8 used in the Two-Mode Hybrid trucks and SUVs, with variable valve timing. VIN engine digit \"5\".\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLZ1\u003c\/strong\u003e: 6.0L hybrid V8 for 2010–2013 Two-Mode Hybrid models, flex-fuel capable with variable valve timing. VIN engine digit \"J\".\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLV3\u003c\/strong\u003e: 4.3L EcoTec3 V6 with direct injection, the base engine in the 2014–2018 Silverado 1500 and Sierra 1500.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eL83\u003c\/strong\u003e: 5.3L EcoTec3 V8 with direct injection, variable valve timing and flex-fuel capability. VIN engine digit \"C\".\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eL86\u003c\/strong\u003e: 6.2L EcoTec3 V8 with direct injection and variable valve timing. VIN engine digit \"J\".\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuick definitions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDoD:\u003c\/strong\u003e Displacement on Demand, the original name for AFM.\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\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\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\u003eRPO code:\u003c\/strong\u003e GM's three-character option code; engine codes begin with L.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eVIN 8th digit:\u003c\/strong\u003e The VIN character that identifies the engine.\u003c\/p\u003e\u003ch2\u003eModel background\u003c\/h2\u003e\u003cp\u003eGM's full-size trucks and SUVs from the 2007 model year rode on the GMT900 platform with Gen IV V8s. The 2014 Silverado 1500 and Sierra 1500, and the 2015 Tahoe, Suburban, Yukon and Escalade, moved to the K2XX platform with the EcoTec3 engines (4.3L LV3, 5.3L L83, 6.2L L86). Both generations used AFM on most gasoline V8s, so the engine code decides fitment more reliably than the model name.\u003c\/p\u003e\u003ch2\u003eThe 6.2L V8 story: L92, L9H and L94\u003c\/h2\u003e\u003cp\u003eNot every GMT900 6.2L has cylinder deactivation. The L92 (2007–2008 Escalade, Yukon Denali and related models) had no working AFM, and the 2009 flex-fuel L9H had none either. AFM arrived on the 6.2L for 2010 as the L94 in the Escalade and Yukon Denali family. Published application lists show the 2007–2013 Sierra 1500 Denali with the L92\/L9H instead. The 2014-on EcoTec3 6.2L L86 brought AFM to the newer trucks and SUVs.\u003c\/p\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\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\u003eAfter-install checks\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\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\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\n\u003ctr\u003e\n\u003ctd\u003eLY5\u003c\/td\u003e\n\u003ctd\u003e5.3L\u003c\/td\u003e\n\u003ctd\u003e315–320 hp\u003c\/td\u003e\n\u003ctd\u003e335–340 lb-ft\u003c\/td\u003e\n\u003ctd\u003e9.95:1\u003c\/td\u003e\n\u003ctd\u003eiron block, AFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLC9\u003c\/td\u003e\n\u003ctd\u003e5.3L\u003c\/td\u003e\n\u003ctd\u003e315–320 hp\u003c\/td\u003e\n\u003ctd\u003e335 lb-ft\u003c\/td\u003e\n\u003ctd\u003e9.60:1 or 9.95:1\u003c\/td\u003e\n\u003ctd\u003ealuminum block, AFM, E85-capable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLMG\u003c\/td\u003e\n\u003ctd\u003e5.3L\u003c\/td\u003e\n\u003ctd\u003e315–320 hp\u003c\/td\u003e\n\u003ctd\u003e335–340 lb-ft\u003c\/td\u003e\n\u003ctd\u003e9.60:1\u003c\/td\u003e\n\u003ctd\u003eAFM, E85-capable\u003c\/td\u003e\n\u003c\/tr\u003e\n\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\n\u003ctr\u003e\n\u003ctd\u003eLFA\u003c\/td\u003e\n\u003ctd\u003e6.0L\u003c\/td\u003e\n\u003ctd\u003e332 hp\u003c\/td\u003e\n\u003ctd\u003e367 lb-ft\u003c\/td\u003e\n\u003ctd\u003e10.80:1\u003c\/td\u003e\n\u003ctd\u003ealuminum block, AFM, hybrid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLZ1\u003c\/td\u003e\n\u003ctd\u003e6.0L\u003c\/td\u003e\n\u003ctd\u003e332 hp\u003c\/td\u003e\n\u003ctd\u003e367 lb-ft\u003c\/td\u003e\n\u003ctd\u003e10.80:1\u003c\/td\u003e\n\u003ctd\u003ealuminum block, AFM, VVT, hybrid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLV3\u003c\/td\u003e\n\u003ctd\u003e4.3L\u003c\/td\u003e\n\u003ctd\u003e285 hp\u003c\/td\u003e\n\u003ctd\u003e305 lb-ft\u003c\/td\u003e\n\u003ctd\u003en\/a\u003c\/td\u003e\n\u003ctd\u003eV6, AFM, direct injection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eL83\u003c\/td\u003e\n\u003ctd\u003e5.3L\u003c\/td\u003e\n\u003ctd\u003e355–376 hp\u003c\/td\u003e\n\u003ctd\u003e383–416 lb-ft\u003c\/td\u003e\n\u003ctd\u003e11.00:1\u003c\/td\u003e\n\u003ctd\u003ealuminum block, AFM, VVT, direct injection, E85-capable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eL86\u003c\/td\u003e\n\u003ctd\u003e6.2L\u003c\/td\u003e\n\u003ctd\u003e420 hp\u003c\/td\u003e\n\u003ctd\u003e460 lb-ft\u003c\/td\u003e\n\u003ctd\u003e11.50:1\u003c\/td\u003e\n\u003ctd\u003ealuminum block, AFM, VVT, direct injection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eQuestions owners ask\u003c\/h2\u003e\u003ch3\u003eWhich GMC Sierra 1500 years and engines does it fit?\u003c\/h3\u003e\u003cp\u003eThe fitment table lists GMC Sierra 1500 2007–2018 with 4.3L V6, 5.3L V8, 6.0L V8, 6.2L V8. 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 GMC Sierra 1500?\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 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 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 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 do I tell which engine my GMC Sierra 1500 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\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\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\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\u003ch2\u003eOrdering details\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":56493783318900,"sku":"RC-AFM-DFM-01-16","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1030\/8439\/2820\/files\/RC-AFM-DFM-01-16-1.jpg?v=1793172287","url":"https:\/\/automotivebypass.com\/products\/afm-dfm-vcm-disabler-gmc-sierra-1500-2007-2018-afm-dfm-disabler","provider":"Automotivebypass","version":"1.0","type":"link"}