{"product_id":"afm-dfm-vcm-disabler-chevrolet-caprice-ppv-2011-2019-afm-dfm-disabler","title":"Chevrolet Caprice PPV 2011-2019 6.0L V8 AFM\/DFM Disabler","description":"\u003cp\u003eFits the 2011–2019 Chevrolet Caprice PPV. 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. 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\u003cli\u003e2011–2019 Chevrolet Caprice PPV: 6.0L V8\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eGM engine codes with AFM that line up with these years and displacements:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eL77 (6.0L, 2011–2017, VIN 8th digit \"2\")\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\u003eWhat AFM does on these engines\u003c\/h2\u003e\u003cp\u003eOn AFM V8 engines, the computer shuts off fuel and holds the valves closed on cylinders 1, 7, 6 and 4 when the load is light, so the engine runs as a V4. It does this through special collapsible lifters on those cylinders, fed by oil-pressure solenoids. When you ask for more power, the lifters lock again and all eight cylinders fire. GM describes this behavior in its service bulletin on AFM and DFM operation.\u003c\/p\u003e\u003ch2\u003ePractical notes\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\u003eWhat to expect on the road\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\u003eWhy owners disable it\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\u003ePlug-in module vs. a mechanical AFM delete\u003c\/h2\u003e\u003cp\u003eThere are three common ways to stop cylinder deactivation on GM engines: a plug-in module like this one, a custom tune that turns AFM off in the engine computer, or a mechanical delete that replaces the AFM lifters and related hardware and then needs a tune to match. The module is the only one of the three that needs no tools and no engine-computer changes, and it is the only one you can undo by unplugging it. It does not replace failed lifters; if hardware is already damaged, the repair comes first.\u003c\/p\u003e\u003ch2\u003eDiagnose existing problems 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\u003eMaintenance still matters\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\u003eFitment check\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eYour model year, model and engine match a row in the table (2011–2019 Chevrolet Caprice PPV).\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\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\u003e2011\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eCaprice PPV\u003c\/td\u003e\n\u003ctd\u003e6.0L V8\u003c\/td\u003e\n\u003ctd\u003eL77\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\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eCaprice PPV\u003c\/td\u003e\n\u003ctd\u003e6.0L V8\u003c\/td\u003e\n\u003ctd\u003eL77\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\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eCaprice PPV\u003c\/td\u003e\n\u003ctd\u003e6.0L V8\u003c\/td\u003e\n\u003ctd\u003eL77\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\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eCaprice PPV\u003c\/td\u003e\n\u003ctd\u003e6.0L V8\u003c\/td\u003e\n\u003ctd\u003eL77\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\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eCaprice PPV\u003c\/td\u003e\n\u003ctd\u003e6.0L V8\u003c\/td\u003e\n\u003ctd\u003eL77\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\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eCaprice PPV\u003c\/td\u003e\n\u003ctd\u003e6.0L V8\u003c\/td\u003e\n\u003ctd\u003eL77\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\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eCaprice PPV\u003c\/td\u003e\n\u003ctd\u003e6.0L V8\u003c\/td\u003e\n\u003ctd\u003eL77\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\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eCaprice PPV\u003c\/td\u003e\n\u003ctd\u003e6.0L 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\u003e2019\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eCaprice PPV\u003c\/td\u003e\n\u003ctd\u003e6.0L 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\u003eInstall prep checklist\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\u003eTerms used on this page\u003c\/h2\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\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\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\u003cp\u003e\u003cstrong\u003eRPO code:\u003c\/strong\u003e GM's three-character option code; engine codes begin with L.\u003c\/p\u003e\u003ch2\u003eWhere AFM came from\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\u003eEngine specifications\u003c\/h2\u003e\u003cp\u003ePublished output and key features of the relevant engines. Exact ratings depend on the vehicle and model 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\u003eL77\u003c\/td\u003e\n\u003ctd\u003e6.0L\u003c\/td\u003e\n\u003ctd\u003e349–362 hp\u003c\/td\u003e\n\u003ctd\u003e381–391 lb-ft\u003c\/td\u003e\n\u003ctd\u003en\/a\u003c\/td\u003e\n\u003ctd\u003eAFM, E85-capable\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eThe engines behind the codes\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eL77\u003c\/strong\u003e: 6.0L flex-fuel V8 used in the Chevrolet Caprice PPV and the Holden-built cars. VIN engine digit \"2\".\u003c\/li\u003e\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\u003eTroubleshooting\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eCheck-engine light after fitting:\u003c\/strong\u003e Unplug the module, read the code and contact support with the code and the VIN.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eEngine still feels like it is switching modes:\u003c\/strong\u003e Confirm the module is fully seated in the port and that the engine code is an AFM engine listed for this vehicle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eScan tool will not connect:\u003c\/strong\u003e The module occupies the port; remove it while the tool is in use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTicking or misfire continues:\u003c\/strong\u003e That is a mechanical or ignition fault. The module prevents switching; it does not repair hardware.\u003c\/p\u003e\u003ch2\u003eQuestions owners ask\u003c\/h2\u003e\u003ch3\u003eDoes it plug into the OBD-II port on the Chevrolet Caprice PPV?\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\u003eHow do I tell which engine my Chevrolet Caprice PPV 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\u003eWhich Chevrolet Caprice PPV years and engines does it fit?\u003c\/h3\u003e\u003cp\u003eThe fitment table lists Chevrolet Caprice PPV 2011–2019 with 6.0L V8. 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 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\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\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\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 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\u003eWarranty and returns\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":56493783122292,"sku":"RC-AFM-DFM-01-13","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1030\/8439\/2820\/files\/RC-AFM-DFM-01-13-1.jpg?v=1793172257","url":"https:\/\/automotivebypass.com\/products\/afm-dfm-vcm-disabler-chevrolet-caprice-ppv-2011-2019-afm-dfm-disabler","provider":"Automotivebypass","version":"1.0","type":"link"}