The Range Technology AFM/DFM Disabler for GM vehicles is the perfect solution for drivers who want full control over their engine’s performance. This simple plug-and-play device disables GM’s Active Fuel Management (AFM) and Dynamic Fuel Management (DFM) systems, allowing your engine to run in full cylinder mode at all times. No more frustrating transitions between V4 and V8 operation. Just smooth, consistent power whenever you need it. Designed for GM trucks, SUVs, and cars, the AFM/DFM Disabler helps eliminate issues like excessive oil consumption, lifter failure, and rough idle, giving you improved reliability and a stronger, more responsive driving experience.

Installation couldn’t be easier, simply plug the Range device into your vehicle’s OBD-II port, and it instantly disables cylinder deactivation without requiring any tools or permanent modifications. It doesn’t reprogram your ECU or leave a trace; just unplug it at any time to return your vehicle to stock operation. The disabler is completely safe for your GM’s electronics and features built-in power management to prevent battery drain when the vehicle is off.

Whether you’re towing, off-roading, or daily driving, the Range Technology AFM/DFM Disabler ensures your engine stays in full power mode for better throttle response, smoother acceleration, and improved performance consistency. Compatible with a wide range of GM applications including the Chevrolet Silverado, Tahoe, Suburban, GMC Sierra, Yukon, and Cadillac Escalade. This device is trusted by enthusiasts who demand the best from their trucks.

Features:

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
Also disables Auto Start/Stop
The Range AFM/DFM Disabler does not reprogram your factory ECU
Works in 5.3L/6.2L 10-speed along with hundreds of other applications
Leaves no trace, unplug it to return to factory settings
Fits all V6 and V8 General Motors (GM) active or dynamic fuel management vehicles, includes cars, trucks, and SUVs
This device does not support the 2022.5+ Refresh model trucks or 2021+ SUVs
To confirm your 2022 model truck is compatible with this unit, check your VIN. The 12th digit in an early model must be a '4' or lower
Made in USA

Range Technology

Range Technology *USE: RNGRA003B* SKU Range GM AFM Disabler Red | RA003R

Range Technology USE: RNGRA003B SKU Range GM AFM Disabler Red | RA003R