The GMC AT4 sub-brand can be found across Big Red's lineup, with the vast majority of models offering an AT4 variant. The ...

Standard equipment includes the features that come with this vehicle. Select Your Options Choose options to include in this vehicle value. For the most accurate pricing and values on new or used ...

Please use care in your use of the information provided. How much horsepower and torque does a 2023 GMC Sierra 2500HD AT4 4WD Crew Cab Long Box have? The 2023 GMC Sierra 2500HD AT4 4WD Crew Cab ...

It’s important to carefully check the trims of the car you’re interested in to make sure that you’re getting the features you want, and aren’t overpaying for those you don’t want.

The GMC Sierra AT4 pickup features a range of distinct exterior styling elements, including unique wheel designs. But which ...