New 2026 GMC Sierra 2500HD

Experience the power and capability of the 2026 GMC Sierra 2500HD AT4 Crew Cab, designed for demanding work and confident off-road adventures.

This heavy-duty truck is equipped with a robust 6.6L V8 gasoline engine featuring direct injection and variable valve timing, delivering 401 horsepower and 464 lb-ft of torque. The 10-speed automatic transmission and 4x4 drivetrain with locking limited-slip differential ensure smooth, controlled performance on any terrain. The AT4 trim adds rugged style and functionality with aluminum wheels, off-road tires, running boards, integrated tailgate step, and bed liner for enhanced durability.

Inside, the Sierra 2500HD offers premium comfort with leather bucket seats that are heated and cooled, plus power adjustments with memory settings and lumbar support for both driver and passenger. The rear bench seat includes heating and a pass-through for added versatility. Technology features include a multicolour 15-inch head-up display, rear camera mirror, and an aerial view display system to keep you aware of your surroundings. The AT4 Preferred Package adds a rear sliding power window, roof marker lamps, and universal home remote.

Safety is comprehensive with automatic high beams, blind spot monitoring, front collision mitigation, lane departure warning, and multiple airbags. The Gooseneck/5th Wheel Prep Package makes towing large trailers effortless with a dedicated hitch platform and 7-pin trailer harness. This Sierra 2500HD AT4 is built to handle your toughest jobs with confidence and style.