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Which GM engines skip AFM?

General Motors’ Active Fuel Management system has been around long enough to earn both fans and vocal critics, and that split has created a simple but urgent question for buyers: which GM engines ...
GM Authority

C8 Corvette ZR1 Twin-Turbo LT7 Engine: No Cylinder Deactivation

The 2025 Corvette ZR1 isn’t short on impressive specs – from the four-figure horsepower, to the 1,200 pounds of downforce, to exhaust gas that exits the rear pipes so fast it provides thrust, the new ...
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

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 ...
Jalopnik

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

We may receive a commission on purchases made from links. Imagine you could get all the brawny output of a robust V8 engine in your truck when needed, but also get improved fuel efficiency while ...