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NHTSA ID Number: 10202400
Manufacturer Communication Number: PIP5824
Summary
This Preliminary information communicates a possible issue with the active fuel management rockers causing a misfire and the correction for this concern.
Condition
A 2021 vehicle equipped with a HFV6 Gen2 engine with AFM may be brought into the dealership with misfires on cylinder 2 or 5.
This could be misfire all the time or start after an AFM event that may or may not go away.
Cause
We have determined there is an issue with some rockers / SRFF’s on the vehicles within the breakpoints listed above.
Parts Information
| Description | Part Number | QTY. |
| Switching valve rocker arm | 12666601 | 4 |
| Dual Feed Hydraulic Lash Adjuster | 12690246 | 4 |
8 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
CADILLAC | CT5 | 2021 |
| CADILLAC | XT5 | 2021 |
| CADILLAC | XT6 | 2021 |
| CHEVROLET | BLAZER | 2021 |
| CHEVROLET | CAMARO | 2021 |
| CHEVROLET | COLORADO | 2021 |
| GMC | ACADIA | 2021 |
| GMC | CANYON | 2021 |
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5824
Published date: 09/22/2021
MC-10202400-9999.pdf 100.326KB
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- 🏁【2025 New Version】AFM/DFM Disabler is the 2025 new upgraded version, which outperforms the old model and compatible with much more popular vehicle models.
- 👍【Safety Guarantee】This AFM Disabler won't modify your original ECU programming; unplugging it resets to factory default settings.
- 🔧【Simple Usage】No tools required; simply plug into the OBD-II port and it starts working.
- 🛠️【Enhanced Driving Experience】AFM/DFM Disabler keeps your engine in V6/V8 mode at full power all the time, enhancing the driving experience.
- ❤️【100% After-Sales Satisfaction Guarantee】If you have any quality issues or dissatisfaction with our AFM Disabler, feel free to contact us; we'll offer returns or exchanges. We always adhere to providing a 100% satisfaction guarantee for our customers. (Note: Please check compatibility with your car model before purchase.)
- Compatible with V6 / V8 General Motors
(GM) active or dynamic fuel management vehicles, includes cars, trucks, and SUVs. - OBDCAR AFM/ DFM Disabler allows your V6/ V8 GM vehicle to run in full cylinder mode at all times, preventing the Active or Dynamic Fuel Management system from dropping cylinders.
- Fast and easy setup; simply plug into your onboard OBD-II port and it instantly begins working to eliminate the AFM/DFM system.
- Will not reprogram your factory ECU, unplug it to return to factory settings.
- Please confirm the compatibility before ordering it.
- The Range AFM/DFM Disabler allows your V6 or V8 vehicle to run in full cylinder mode at all times, preventing the Active or Dynamic Fuel Management system from dropping cylinders.
- Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. Full power delivery all the time without factory warranty concerns.
- Range AFM/DFM Disabler keeps you in full power 100% of the time. | Simply plug into your onboard OBD-II port and it instantly begins working to eliminate the AFM/DFM system. | The power and control you need in any situation.
- The Range AFM/DFM Disabler does not reprogram your factory ECU. | Leaves no trace. Unplug it to return to factory settings | Compatible with all V6 and V8 GM active or dynamic fuel management vehicles, includes cars, trucks, and SUVs.
- Please check compatibility
- 【Optimized Fuel Combustion Efficiency】The AFM DFM Disabler utilizes a full-cylinder combustion principle, ensuring fuel burns efficiently. This reduces and clears carbon deposits in the engine, helping to alleviate issues such as increased fuel consumption or engine stress caused by incomplete combustion over time
- 【Compatibility】The Active Fuel Management Disabler designed for GM vehicles from 2004 to 2019, the AFM Disabler is compatible with models like Chevy Camaro, Silverado 1500, Suburban, Tahoe, and GMC Canyon, Sierra 1500, Yukon, and Denali. Ensure compatibility with your vehicle's year and engine size (3.6L, 4.3L V6 )(5.3L, 6.0L, 6.2L V8) by checking the product details and images
- 【Plug-and-Play】The AG001 AFM Disabler plugs directly into the vehicle's OBDII port, making it safe and convenient to use. It operates without altering the factory ECU settings, so it won’t affect your vehicle's original condition
- 【Power Optimization】The AFM DFM Disabler disconnects from the power source when the vehicle is off, minimizing battery drain. Older vehicles might experience delayed ignition or battery drain if the device is left plugged in for extended periods without driving. To prevent this, either drive the vehicle regularly or remove the device if the vehicle will be unused for more than a week
- Compatible with most V6 & V8 GM active or dynamic fuel management motors, includes cars, trucks & SUVs.
- Keep your vehicle in V8 model with full power. Disable 4 cylinder mode on your car and fit for a wild range of GM V8 V6 vehicles.
- Plug and play, install without any tools. Pls unplug the OBDAFM Device if it's not used for a long time.
- Leaves no trace, Unplug it to return to factory settings. This AFM Disabler does not reprogram your factory ECU.
- When the device was plugged into the port, blue lights will flash in sequence and then turn off. It just indicated that the device was connected and working normally.
- Unleash Uncompromised Power: Stop leaving performance on the table. The Max Cylinder AFM disabler maximizes every ounce of your engine's true potential by preventing cylinder deactivation in AFM or DFM vehicles.
- Conquer the Shudder: Say goodbye to jerky, disruptive engine shudder. This plug-and-play dynamic and active fuel management disabler delivers a smooth driving experience at maximum power.
- Embrace the Rumble: This AFM/DFM disabler lets you savor every growl and purr from your vehicle - especially with an aftermarket performance exhaust installed - no more muffled roars.
- Install with Ease: Simply plug-in under the dash to install. It won’t delete factory settings and no special tools or kit is needed. This AFM/DFM disabler is optimized for most GM V6 and V8 AFM/DFM vehicles and most Chevy Silverado 5.3, 6.2 engines
- Built Tough, Backed by Precision: Max Cylinder AFM/DFM disabler is expertly engineered and made with high-quality OEM-grade components in the USA for a compact, unintrusive form factor and unrivaled quality you can trust.
- No installation required, simply plug into your onboard OBD-II port and it instantly begins working to eliminate the AFM/DFM system.
- OBDAFM AFM/ DFM Disabler allows your V6/ V8 GM motors to run in full cylinder mode at all times, preventing the Active or Dynamic Fuel Management system from dropping cylinders.
- Compatible with V6 / V8 General Motors active or dynamic fuel management vehicles, includes cars, trucks, and SUVs.
- Will not reprogram your factory ECU, unplug it to return to factory settings.
- Please confirm the compatibility before ordering it.
- 【FITS FOR MOST GM V6/V8】Compatible with most V6 / V8 GM active or dynamic fuel management vehicles, includes cars, trucks, and SUVs.Before making your purchase, check the compatibility to ensure a seamless integration. While the AFM/DFM Disabler is compatible with most GM V6 and V8 engines, it's essential to note that it does not support 2019+ Silverado and Sierra models equipped with the 5.3L/3.6L engine and 10-speed transmission, as well as C8 Corvettes and 2022 Refresh truck or SUV models.
- 【PLUG AND PLAY and KEEP SAFETY】No installation required, simply plug into your vehicle OBD-II port and it instantly begins working to eliminate the AFM system.Unplug it to return to factory settings,Doesn’t reprogram the factory ECU.Once removed,leaves no trace preserving your vehicle’s warranty and resale value.
- 【KEEP V6/V8 ALL TIME 】This AFM/DFM Disabler allows your V6 or V8 vehicle to run in full cylinder mode at all times, help your car get full power.Preventing the Active or Dynamic Fuel Management system from dropping cylinders or more shuddering.gives you a smoother driving experience. (Disables 4-cylinder mode).
- 【PREVENT LIFTER FAILURE & IMPROVE RELIABILITY】Our device fully disables active and dynamic fuel management, preventing collapsed and sticking lifters caused by these systems. Reliable and Durable,this device built with high-quality materials to ensure durability and longevity, our AFM Disabler is a reliable investment for your vehicle.
- 【LOW BATTERY DRAIN 】After you parked and locked your car,our AFM disabler will enter low-power sleep mode so it is will drain much much less power than competitors.this can make sure your car can start smoothly at next time. No battery drain causing dead batteries & no-starts!
- ✅【Complete AFM/DFM Deactivation】This device fully disables Active Fuel Management (AFM) and Dynamic Fuel Management (DFM) systems, allowing your engine to run on all cylinders V6/V8 mode at all times, enhancing performance and reliability.
- ✅【Protect Your Engine & Reduce Wear】Prevents lifter failure, reduces oil consumption, and minimizes engine knocking—extends engine lifespan and reliability.
- ✅【Simple, Plug-and-Play Installation】 No complicated tools or technical knowledge required. Just plug it into your vehicle’s OBD-II port and enjoy immediate results.
- ✅【Enhance Engine Performance】Safely disables AFM (Active Fuel Management) system, ensuring all V8 engine cylinders remain active for consistent power and smoother performance.
- ✅【No Impact on Factory Warranty】Designed to be easily removable without leaving any trace, this AFM Disabler won’t void your vehicle’s factory warranty, giving you peace of mind.
- Engine Compatibility: Compatible with a range of engine sizes including 4.3L, 5.3L, 6.0L, and 6.2L, ensuring broad applicability for various GM models.
- Unlock Full Power with AFM/DFM Disabler: Boost your V6 and V8 vehicle's performance with our AFM/DFM Disabler Device. Engineered for compatibility with various V6/V8 models, this device is your key to unleashing your engine's true power.
- Seamless Integration with Plug & Play Technology: Simplify your life with our easy-to-use device that plugs directly into your OBD-II port. It starts working right away to disable the AFM/DFM system, eliminating the need for complicated installations.
- Our device does not alter your vehicle's ECU. Simply unplug it to return your vehicle to its original factory settings, preserving the integrity of your vehicle's electronics.Upon inserting a device into the port, the blue light flashes sequentially, signifying that the device has been connected and is operating normally
- If you have any technical issues, you can reach us at (lestore2010@gmail.com). We are available to provide technical support at any time
Last update on 2025-06-10 / Affiliate links / Images from Amazon Product Advertising API
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Bulletin No.: PIP5824 Published date: 09/22/2021 Preliminary Information PIP5824 2021 HFV6 Engine Misfire On AFM Cylinders 2 or 5 Models Brand: Cadillac Cadillac Cadillac Chevrolet Chevrolet Chevrolet GMC GMC Model: CT5 XT5 XT6 Blazer Camaro Colorado Acadia Canyon Model Years: 2021 2021 2021 2021 2021 2021 2021 2021 VIN: from to 2/1/2021 7/1/2021 2/1/2021 7/1/2021 2/1/2021 7/1/2021 2/1/2021 7/1/2021 2/1/2021 7/1/2021 2/1/2021 7/1/2021 2/1/2021 7/1/2021 2/1/2021 7/1/2021 Engine: 3.0 LGY 3.6 LGX 3.6 LGX 3.6 LGX 3.6 LGX 3.6 LGZ 3.6 LGX 3.6 LGZ All All All All All All All All Transmissions: Involved Region or Country Condition Cause North America A 2021 vehicle equipped with a HFV6 Gen2 engine with AFM may be brought into the dealership with misfires on cylinder 2 or 5. This could be misfire all the time or start after an AFM event that may or may not go away. We have determined there is an issue with some rockers / SRFF’s on the vehicles within the breakpoints listed above. Correction: If you have a vehicle with this concern, swap the AFM rocker oil control solenoid in the camshaft cover from side to side and reevaluate. If the misfire remains or comes back after an AFM event on the same cylinder, replace all 4 rockers / SRFF’s and all 4 SHLA’s / lifters for the affected cylinder. If the misfire goes away or moves to the other bank, replace the AFM oil control solenoid. Parts Information Description Switching valve rocker arm Dual Feed Hydraulic Lash Adjuster Part Number 12666601 12690246 QTY. 4 4 Warranty Information For vehicles repaired under the Powertrain coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information. Please use the Labor Operation for the vehicle and bank you are working on. Version History Version 1 Modified 09/22/2021 – Created on.
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