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 truck designed for heavy-duty performance and refined comfort.

This Sierra 3500HD 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. Its 4-wheel drive system and locking limited-slip differential provide exceptional traction and control on any terrain. The truck’s long bed features a bed liner, integrated tailgate step, and a gooseneck/5th wheel prep package, making it ideal for towing heavy trailers with ease.

Inside, the Denali Ultimate trim offers premium leather seats with heating, cooling, massage functions, and adjustable lumbar support for both driver and passenger. Seat memory and power adjustments enhance comfort on long hauls. The cabin is equipped with advanced safety features including blind spot monitoring, front collision mitigation, lane departure warning, and adaptive cruise control. Visibility and convenience are boosted by LED headlights, heated power folding mirrors with integrated turn signals, and an aerial view display system.

Additional highlights include power retractable running boards, a premium sound system, heads-up display, and remote engine start—perfect for drivers who demand capability and sophistication in every journey.