Features: 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. OBDCAR AFM/DFM Disable Device PLUG AND PLAY KEEP THE FACTORY ECU KEEP IN V6/ V8 MODEL NOTE: 1.The OBDCAR AFM/DFM Disabler is compatible with 5.3L/6.2L 10-speed along with hundreds of other applications. 2. The OBDCAR AFM/DFM Delete is NOT compatible with the 2022 Refresh model trucks or SUVs. ( To confirm your 2022 model truck is compatible with this unit, check the VIN. The 12th digit in an early model must be a '4' or lower.) 3. If the OBDCAR Device is not used for a long time, please take the product off to avoid running out of battery.