In addition to keeping your truck in full power 100 percent of the time, the Range AFM/DFM Disabler simply plugs into your OBD-II port and instantly defeats the Active Fuel Management or Dynamic ...

CARBYTE AFM/DFM Disabler & Auto Start/Stop Eliminator for 2005-2024 GM Trucks, SUVs & Cars. This device works I have a 2020 High Country with a 6.2L / 10 speed transmission.

It turns off the AFM system upon plugging in, enabling the engine to always run in full V6 or V8 mode. In most cases, an AFM disabler will not reprogram the factory ECU and will not void the warranty.

In fact, while the OBDDFM AFM/DFM Disable Device sold on Amazon for $53.99 does work as it claims, it will actually make your GM vehicle use more gas.

If you're not sure whether a particular GM vehicle has the AFM system in its engine, there are a few methods to identify it. First, you can check the owner's manual for the vehicle, which can ...

2021 GMC Sierra 1500 - AFM/DFM Availability; Trim Level Engine Transmission Fuel Management; Sierra: 5.3L V8 L82: 6-speed automatic: No AFM: SLE 2WD: 5.3L V8 L84 ...

Malcho also confirmed to Autoblog that the Silverado and Sierra’s other engines will continue to have AFM and DFM, including the 2.7-liter turbo inline-four, 4.3-liter V6 and 6.2-liter V8.