Experience unmatched capability and refined comfort with the 2026 GMC Sierra 3500HD AT4 Crew Cab 4WD, designed for those who demand power and precision on every job site and road.

Powered by a robust Duramax 6.6L Turbo-Diesel V8 engine delivering an impressive 470 horsepower and a staggering 975 lb-ft of torque, this Sierra 3500HD is built to handle the toughest hauls and heaviest trailers with ease. The advanced 10-speed automatic transmission and locking limited-slip differential ensure smooth, confident control whether navigating rugged terrain or highway driving. The AT4 trim adds rugged styling and off-road-ready features, including integrated tow hooks, running boards, and an integrated tailgate step for easy bed access. Inside, premium leather bucket seats with heating, cooling, and power adjustments provide exceptional comfort, while seat memory and adjustable lumbar support keep you perfectly positioned throughout long days. Safety is paramount with technologies like blind spot monitoring, front collision mitigation, lane departure warning, and an aerial view display system that enhances situational awareness. The bed liner protects your cargo area, while the conventional spare tire and trailer hitch are ready for any task. Finished in striking Coastal Dune, this Sierra 3500HD AT4 is the ultimate combination of strength, technology, and luxury for the discerning Canadian driver.