Conquer the Canadian Terrain with the 2026 GMC Sierra 3500HD AT4: Unmatched Power, Advanced Safety, and Rugged Elegance for the Ultimate Driving Experience

Step into the commanding presence of the 2026 GMC Sierra 3500HD AT4, a truck engineered for those who demand unparalleled power and sophisticated technology. The heart of this beast is the Duramax 6.6L Turbo-Diesel V8 engine, delivering a staggering 470 horsepower and 975 lb-ft of torque, ensuring you have the muscle to tackle any challenge. Equipped with a 10-speed automatic transmission and a robust 4x4 drivetrain, the Sierra 3500HD AT4 is ready for the toughest terrains and heaviest hauls.

Safety is paramount, with cutting-edge features like Blind Spot Monitor, Lane Departure Warning, and Front Collision Mitigation, providing peace of mind on every journey. The AT4 Premium Plus Package enhances your drive with a power sunroof, Off-Road High Clearance steps, and a multicolour 15" Head-Up Display, keeping vital information in your line of sight.

Inside, luxury meets functionality with leather seats, a heated steering wheel, and a 13.4" diagonal premium infotainment system featuring wireless Android Auto and Apple CarPlay. The Gooseneck/5th Wheel Prep Package and power-retractable assist steps ensure you're equipped for any adventure. Experience the perfect blend of power, technology, and style with the GMC Sierra 3500HD AT4.