2026 GMC Sierra 2500HD Denali Ultimate

Experience unmatched power and luxury with the 2026 GMC Sierra 2500HD Denali Ultimate, a diesel 4x4 crew cab built for demanding work and refined comfort.

This heavy-duty truck is equipped with 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 4-wheel drive system and locking limited-slip differential ensure superior traction and control across all terrains, complemented by all-terrain tires front and rear.

Designed for both capability and convenience, the Sierra 2500HD features a gooseneck and fifth-wheel prep package with a hitch platform and 7-pin trailer harness, ideal for serious towing tasks. The bed includes a liner and an integrated tailgate step, while power-retractable running boards and bed-mounted assist handles provide easy access.

Inside, five occupants enjoy premium leather seats with heating, cooling, and massage functions, plus adjustable lumbar support and memory settings for driver and passenger. Advanced safety technologies like blind spot monitoring, cross-traffic alert, lane departure warning, and front collision mitigation enhance peace of mind. Additional highlights include an aerial view display system, heads-up display, heated steering wheel, and a premium sound system, making every drive both productive and enjoyable.