Experience unmatched capability and refined comfort in the 2026 GMC Sierra 2500HD AT4, designed for those who demand power, advanced technology, and rugged versatility in every drive.

Built to conquer the toughest tasks, the Sierra 2500HD AT4 features a robust turbocharged 8-cylinder diesel engine paired with a smooth 10-speed automatic transmission and a 4x4 drivetrain, delivering exceptional towing and hauling performance. Its locking limited-slip differential and integrated tow hooks ensure confidence on challenging terrain, while the bed liner and integrated tailgate step provide practical durability and easy access for your gear. Inside, premium leather bucket seats with heating, cooling, and adjustable lumbar support keep you comfortable during long hauls, complemented by seat memory for personalized settings. The crew cab offers spacious rear seating with heated seats and a pass-through rear seat for added convenience. Advanced safety technologies such as blind spot monitoring, lane departure warning, front collision mitigation, and an aerial view display system enhance your awareness on the road and off it. Connectivity is seamless with smart device integration, WiFi hotspot, navigation, and a premium sound system. The Sierra’s rugged aluminum wheels, running boards, and Onyx Black exterior make a bold statement, perfectly matching your demanding lifestyle and professional needs. With a $5,000 cash rebate, this new Sierra 2500HD AT4 is ready to work as hard as you do.