2021 GMC Sierra AT4

Find the perfect combination of power, capability, and comfort with this 2021 GMC Sierra 1500 AT4 4WD, located in Sidney, MT. Powered by a robust 6.2L V8 gasoline engine, this GMC Sierra delivers confident towing, strong acceleration, and dependable performance whether you're headed to the job site or exploring backcountry trails. The AT4 trim adds off-road-ready features and a purposeful appearance—raised suspension, skid plates, and rugged exterior accents—all designed to tackle tough terrain with confidence.

Inside, the GMC Sierra 1500 AT4 offers a refined cabin with supportive seating, intuitive controls, and modern convenience features for long drives and daily commutes alike. Advanced towing technology, multiple drive modes, and a smooth-shifting transmission make hauling trailers and cargo effortless. Safety systems help keep you secure on Montana highways and remote roads.

This 2021 GMC Sierra 1500 AT4 6.2L V8 4WD is competitively priced and represents the best value in the area—claim the best price on this truck in Sidney, MT today. Whether you need a capable workhorse, a weekend adventure vehicle, or a comfortable daily driver, this GMC Sierra delivers. Schedule a test drive in Sidney, MT and experience the power, comfort, and capability of this well-equipped 2021 GMC Sierra 1500 AT4 before it's gone.