New 2026 GMC Sierra 2500HD

Experience commanding power and advanced capability in the 2026 GMC Sierra 2500HD AT4 Crew Cab, finished in striking Onyx Black with premium off-road features.

Built for serious work and rugged adventures, this diesel-powered Sierra 2500HD is equipped with a Duramax 6.6L Turbo-Diesel V8 engine delivering 470 hp and an impressive 975 lb-ft of torque. The 10-speed automatic transmission and four-wheel drive with locking limited-slip differential ensure smooth, confident handling across all terrains. The truck’s off-road readiness is enhanced by body-colour wheel arch mouldings, off-road tires, and dealer-installed high clearance steps for easy access.

Inside, the cabin offers a refined Jet Black and Kalahari interior with heated and cooled leather bucket seats, including power adjustments and lumbar support for both driver and passenger. Seat memory and a pass-through rear bench add convenience and comfort for all five occupants. The AT4 Premium Plus Package adds a power sunroof and a suite of technology features, including an aerial view display system and adaptive cruise control.

Safety is comprehensive with automatic high beams, blind spot monitoring, lane departure warning, front collision mitigation, and cross-traffic alert. The bed is protected with a liner and features an integrated tailgate step and side assist handle for added utility. Tow with confidence using the gooseneck/5th wheel prep package and robust tow hooks.