2026 GMC Sierra 2500HD AT4X

Experience the power and capability of the 2026 GMC Sierra 2500HD AT4X Crew Cab, designed for demanding work and confident off-road performance.

This heavy-duty truck is equipped with a robust Duramax 6.6L Turbo-Diesel V8 engine delivering an impressive 470 horsepower and 975 lb-ft of torque, paired with a smooth 10-speed automatic transmission. Its 4x4 drivetrain and locking limited-slip differential ensure traction and control on any terrain. The Sierra 2500HD AT4X features a bed liner and an integrated tailgate step for easy access, complemented by power retractable running boards that provide convenience and style. For towing needs, the Gooseneck/5th Wheel Prep Package includes a hitch platform and bed-mounted 7-pin trailer harness, ready to handle heavy trailers with ease. Inside, enjoy premium comfort with leather seats that include heating, cooling, adjustable lumbar support, seat memory, and even a massage function for front occupants. Safety is paramount with features such as automatic high beams, blind spot monitoring, cross-traffic alert, front collision mitigation and warning, lane departure warning, and multiple airbags. Additional driver aids include an aerial view display system, adaptive cruise control, and a heads-up display, all designed to keep you informed and secure. The Sierra 2500HD AT4X is built to deliver strength, comfort, and advanced technology for those who demand more from their truck.