What lifters are AFM?
What lifters are AFM? Lifters - AFM engines use special lifters for cylinders 1, 4, 6, and 7. They are taller and have special oil holes. When did GM introduce AFM? 2005 General Motors first introduced its Active Fuel Management cylinder deactivation system in 2005. According to Lee, “Dynamic Fuel Management is a natural progression of the technology.” Did GM do away with AFM? General Motors is now building 2021 Chevy Silverado 1500 and 2021 GMC Sierra 1500 pickup trucks without Active Fuel Management (AFM) and Dynamic Fuel Management (DFM) technologies due to the ongoing global microchip shortage. The change...