Experience unparalleled capability and rugged sophistication with the 2026 GMC Sierra 2500HD AT4, designed for demanding drivers who require power, comfort, and advanced technology.

Powered by a robust 6.6L V8 engine delivering 401 horsepower and 464 lb-ft of torque, this 4WD crew cab truck is built to handle heavy-duty tasks with confidence. The 10-speed automatic transmission and locking limited-slip differential ensure smooth, controlled power delivery on any terrain. The Sierra AT4 features a bed liner and an integrated tailgate step for easy loading and unloading, complemented by running boards and bed-mounted assist handles for added convenience.

Inside, the cabin boasts Jet Black perforated leather seats with Kalahari accents, heated and cooled front seats, heated rear seats, and power-adjustable driver and passenger seats with lumbar support and memory settings for personalized comfort. The AT4 Premium Plus Package adds a power sunroof and advanced technology, including an aerial view display system and adaptive cruise control.

Safety is paramount with features like automatic high beams, blind spot monitoring, cross-traffic alert, front collision mitigation, lane departure warning, and multiple airbags. The Gooseneck/5th Wheel Prep Package equips this truck with a versatile hitch platform, ready for heavy towing demands. Black badging and moulded splash guards complete the rugged, distinctive exterior look.