The 2024 GMC Sierra AT4X is getting an upgraded powerplant for the new model year. Where it once solely featured GM’s 6.2-liter V8 truck engine, it’s now set to offer Duramax diesel power as standard.

Since its introduction in 2022, the off-road-focused GMC Sierra 1500 AT4X has exclusively employed GM’s familiar 6.2-liter gasoline V-8. The AT4X model is now getting a welcomed powertrain addition ...

The most extreme version of the Sierra 1500, the off-road-capable AT4X trim, will now be offered with a fuel-sipping 3.0-liter Duramax diesel engine. The torquey unit will come as standard on the 2024 ...

In a similar fashion to the Silverado 1500 ZR2 for the 2024 model year, the Sierra 1500 AT4X is getting a diesel engine in the form of the 3.0-liter Duramax. Optional in the ZR2, the inline-six turbo ...

Light-duty customers have a single diesel option for model year 2026, that being the 3.0-liter Duramax inline-six turbo ...

A GMC Sierra 1500 owner is stunned that his diesel truck delivers a "shockingly good" 23.5 MPG on logging roads, even with heavy tires. This high-mileage review reveals the Duramax's secret to victory ...

General Motors’ 3.0-liter Duramax diesel inline-six is a seriously solid alternative to gasoline. Drivers love it for its fuel economy and smooth power delivery, no matter which truck or SUV it’s in.