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 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.

When the off-road focused Sierra AT4X debuted, it was equipped with just a single engine option: GMC's premier 420-hp, 6.2-liter V-8. However, since the introduction of the rugged AT4 trim in 2019 ...

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 ...

The Duramax name is not a new one, having first arrived on the scene back in January 2001. This wasn't a 3.0-liter inline-six; the Duramax was a 6.6-liter V8 diesel turbo engine designed to power GM's ...

About two decades after the launch of the 6.6-liter Duramax V8, GM's 3.0-liter Duramax inline-six turbodiesel arrived in 2019 with a promise to deliver "outstanding fuel economy, great horsepower, and ...

General Motors' Duramax diesel engine lineup has been powering GM trucks and SUVs and enthralling gearheads since its original release in 2001. While the most famous member of the Duramax roster is ...