2026 GMC Sierra 3500HD Denali Ultimate

Experience the power and luxury of the 2026 GMC Sierra 3500HD Denali Ultimate, a diesel-powered 4x4 crew cab built for demanding work and refined comfort.

This heavy-duty truck is equipped with a 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. The 4-wheel drive system and locking limited-slip differential ensure exceptional traction and control on any terrain. The Sierra 3500HD features all-terrain tires on aluminum wheels, power retractable running boards, and an integrated tailgate step for easy bed access. The bed liner and conventional spare tire add durability and convenience for tough jobs.

Inside, the Denali Ultimate trim offers premium leather bucket seats with heating, cooling, massage functions, and adjustable lumbar support for both driver and passenger. Seat memory enhances comfort for multiple drivers. The cabin includes an aerial view display system, heads-up display, and a premium sound system for an advanced driving experience. Safety is comprehensive with automatic high beams, blind spot monitoring, front collision mitigation, lane departure warning, and tow hooks for secure hauling. The gooseneck/5th wheel prep package makes towing large trailers effortless. This Sierra 3500HD combines capability, technology, and luxury tailored for serious drivers.