Power through any challenge with the 2026 GMC Sierra 3500HD AT4 Crew Cab 4WD — a diesel powerhouse engineered for serious work and rugged Canadian terrain.

Built to handle the toughest jobs, the Sierra 3500HD AT4 features a Duramax 6.6L Turbo-Diesel V8 engine delivering an impressive 470 horsepower and a staggering 975 lb-ft of torque. Its 10-speed automatic transmission and advanced 4x4 drivetrain with locking limited-slip differential provide smooth, confident control whether you’re towing heavy loads or navigating slippery backroads. The integrated tailgate step and durable bed liner make loading and unloading effortless, while running boards and heated, power-folding mirrors add convenience in all weather conditions.

Inside, premium leather seats with heating, cooling, and memory functions keep you comfortable during long hauls, complemented by driver and passenger adjustable lumbar support. Safety is paramount with features like blind spot monitoring, lane departure warning, front collision mitigation, and adaptive cruise control, ensuring peace of mind on every journey.

The Sierra 3500HD AT4 is more than a truck — it’s a reliable partner designed to meet the demands of tradespeople, outdoor enthusiasts, and anyone who requires strength, capability, and refined comfort in one commanding package.