Experience commanding power and advanced capability with the 2026 GMC Sierra 3500HD AT4 Crew Cab, designed for serious towing and rugged performance in any terrain.

Powered by a Duramax 6.6L Turbo-Diesel V8 engine delivering an impressive 470 horsepower and 975 lb-ft of torque, this 4x4 truck is built to handle the toughest jobs with ease. The 10-speed automatic transmission and locking limited-slip differential ensure smooth, confident control whether on the highway or off-road. The Gooseneck/5th Wheel Prep Package provides a versatile hitch platform, making heavy towing more convenient and secure.

The AT4 Premium Plus Package enhances your driving experience with a power sunroof, advanced technology features, and an Off-Road High Clearance step for easier access. Black badging and body-colour wheel arch mouldings add a bold, rugged aesthetic. Practical touches like the integrated tailgate step, bed liner, running boards, and fold-out side assist handle improve functionality and ease of use.

Inside, heated and cooled leather bucket seats with power adjustments and memory functions offer comfort tailored to your needs. Safety is comprehensive with automatic high beams, blind spot monitoring, cross-traffic alert, front collision mitigation, lane departure warning, and more, keeping you confident on every journey. This Sierra 3500HD AT4 is ready for work and adventure alike.