The verdict: GMC fixed the one big area where the previous Sierra 1500 fell short (the interior), making the new 2022 model a no-excuses, fully competitive premium full-size pickup truck with some ...

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.

The off-road-focused 2024 GMC Sierra AT4X trim of the GMC Sierra 1500 lineup will feature the new 3.0L I6 LZ0 turbodiesel Duramax engine as its standard powerplant, GMC just announced. GM assistant ...