Product Description
Range AFM DFM Disabler Plug-In Module
Fits 2021 & Earlier GM Trucks | 2020 & Earlier GM SUVs | Choose Red, Blue, or Green LED
The Range AFM/DFM Disabler is the simplest and safest way to keep your GM engine running in full power mode at all times. This plug-and-play device instantly disables Active Fuel Management (AFM) and Dynamic Fuel Management (DFM), preventing unwanted transitions between V4 and V8 operation. Enjoy consistent power, smoother acceleration, and improved reliability—without reprogramming your ECU or leaving any trace behind. Perfect for towing, daily driving, or eliminating the common issues caused by cylinder deactivation.
Key Features
- Full-Time V8 Operation: Keeps your engine in 8-cylinder mode 100% of the time for maximum power, smoother throttle response, and improved drivability.
- Disables Auto Start/Stop: Automatically prevents stop/start behavior for consistent performance during daily driving or towing.
- No ECU Programming: Does not modify your factory calibration—simply unplug the device to instantly return to stock operation with no trace left behind.
- Broad GM Compatibility: Works with 5.3L & 6.2L 10-speed applications and hundreds of AFM/DFM-equipped GM V6 and V8 cars, trucks, and SUVs.
- Made in the USA: Built with quality components and designed with integrated power management to prevent battery drain when the vehicle is off.
Key Fitments
- Engines: Compatible with GM V6 and V8 AFM/DFM-equipped engines including 5.3L, 6.0L, and 6.2L powerplants used through 2021 (trucks) and 2020 (SUVs).
- Platforms: Works with Chevrolet Silverado, Suburban, Tahoe; GMC Sierra, Yukon, Yukon XL; Cadillac Escalade; and many other GM AFM/DFM vehicles. Not compatible with 2022.5+ refresh trucks or 2021+ SUVs. For 2022 trucks, VIN 12th digit must be “4” or lower.
- Notes: Choose Blue, Green, or Red LED options—color is cosmetic only and does not affect functionality. Unplug at any time to revert to factory behavior. Does not tune or permanently modify the ECU.
