New 2026 GMC Sierra 3500HD

Experience unmatched capability and comfort with the 2026 GMC Sierra 3500HD AT4, featuring a powerful Duramax 6.6L Turbo-Diesel V8 and advanced off-road enhancements.

Built for demanding tasks, the Sierra 3500HD AT4 is powered by a 470 hp Duramax 6.6L Turbo-Diesel V8 engine delivering an impressive 975 lb-ft of torque, paired with a smooth 10-speed automatic transmission and 4x4 drivetrain. This truck is equipped with a locking limited-slip differential and off-road tires on aluminum wheels, ensuring superior traction on any terrain. The AT4 Premium Plus Package adds a power sunroof, advanced technology features, and an off-road high clearance step for easier access. The Gooseneck/5th Wheel Prep Package provides a versatile hitch platform ready for heavy towing needs. Safety is comprehensive, including automatic high beams, blind spot monitoring, lane departure warning, front collision mitigation, and cross-traffic alert. Inside, enjoy heated and cooled leather bucket seats with power adjustments and memory settings for both driver and passenger, plus heated rear seats for added comfort. Convenience features include a remote engine start, keyless entry and start, multi-zone climate control, and an aerial view display system. With a bed liner, integrated tailgate step, running boards, and all-weather floor liners, this Sierra 3500HD AT4 is ready for work and adventure in Canadian conditions.