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 ...

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 ...

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 ...

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