2026 GMC Sierra 2500HD AT4X

Experience commanding power and advanced capability with the 2026 GMC Sierra 2500HD AT4X in Coastal Dune, designed for demanding work and rugged adventures.

This heavy-duty truck features a robust Duramax 6.6L Turbo-Diesel V8 engine delivering 470 horsepower and an impressive 975 lb-ft of torque, paired with a smooth 10-speed automatic transmission. Its 4x4 drivetrain includes a locking limited-slip differential, ensuring optimal traction in challenging conditions. The Sierra 2500HD AT4X is equipped with a gooseneck and fifth-wheel prep package, featuring a hitch platform and bed-mounted 7-pin trailer harness, perfect for serious towing needs.

Inside, enjoy premium comfort with leather bucket seats offering heating, cooling, and massage functions, plus driver and passenger power-adjustable lumbar support and seat memory. The crew cab provides spacious seating for five, including a pass-through rear seat and heated rear seats for added comfort. Convenience is enhanced by power retractable running boards and an integrated tailgate step, making access effortless.

Safety is paramount with features like adaptive cruise control, blind spot monitoring, front collision mitigation, lane departure warning, and an aerial view display system. Additional amenities include an auto-dimming rearview mirror, heated mirrors, and a premium sound system, making every drive confident and enjoyable.