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Patent alert: GM is cooking up a smarter V-8 that saves fuel without killing the fun

GM files a patent for advanced cylinder deactivation, aiming to make V-8 engines much more efficient without sacrificing ...
GM Authority

GM 6.2L V8 L87 Engine Never Had This Fuel-Saving Feature Constraint

As a result of production constraints and logistics issues stemming from the COVID-19 pandemic, GM decided to remove certain features from a number of its production vehicles. One of the most notable ...
GM Authority

Little-Known Chevy Silverado, Tahoe, Suburban Trick Disables DFM

As GM Authority readers are likely aware, Dynamic Fuel Management (DFM) – GM’s second-generation cylinder deactivation technology that disables a vehicle’s cylinders in the name of fuel economy – is ...
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Which GM Engines Don't Have The AFM System?

In an effort to help meet more restrictive emissions standards, GM launched a technology in 2005 that deactivates engine cylinders during undemanding driving scenarios. Known by both Displacement on ...