[1] GM's Active Fuel Management[2] technology used a solenoid to deactivate the lifters on selected cylinders of a pushrod V-layout engine.
General Motors was the first to modify existing production engines to enable cylinder deactivation, with the introduction of the Cadillac L62 "V8-6-4" in 1981.
[citation needed] In 2001, GM showcased the 2002 Cadillac Cien concept car, which featured Northstar XV12 engine with Displacement on Demand.
Later that year, GM debuted Opel Signum² concept car in Frankfurt Auto Show, which uses the global XV8 engine with displacement on demand.
The Camaro SS with an automatic transmission features the GM L99 engine, a development of the LS3 with Active Fuel Management which allowed it to run on four cylinders during light load conditions.
[3] In January 2018, GM announced an improved version of AFM called Dynamic Fuel Management to be initially released in Chevy Silverado trucks.