What Is Active Fuel Management (AFM) And Why Can It Cause Lifter Noise?

The GM active fuel management system works using special lifters that deactivate select cylinders during some situations to ...
SlashGear

What Does An AFM Disabler Do And Does It Cause Engine Problems?

General Motors's Active Fuel Management (AFM) technology utilizes hydraulic valves, solenoids, and advanced software to shut down half of the cylinders in a V8 or V6 engine to save fuel. The system ...
GM Authority

Range Technology Offers DFM Disabler For Chevy Silverado, GMC Sierra, SUVs: Video

Not everyone likes the driving experience that comes with Dynamic Fuel Management (DFM) or Active Fuel Management (AFM). Some drivers claim turning off cylinders while driving with the goal of ...
GM Authority

Which GM Trucks And SUVs Had DFM (And Auto Stop-Start) Removed During COVID

During the COVID-19 pandemic, supply chain disruptions and semiconductor shortages forced automakers to make some tough decisions. For GM, one of the compromises was the removal of Dynamic Fuel ...