The AFM/DFM Disabler does not reprogram your factory ECU AFM/DFM Disabler keeps you in full power 100% of the time Plug and Play - Simply plug into your onboard OBD-II port and it instantly begins working to eliminate the AFM/DFM system. 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 Refresh model trucks or SUVs. To confirm your 2022 model truck is compatible with this unit, chevk your VIN. The 12th digit in an early model must be a '4' or lower) Leaves no trace; unplug it to return to factory settings 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.