Conquer the Road with the 2026 GMC Sierra 3500HD AT4: Power, Precision, and Premium Comfort for the Ultimate Driving Experience

Step into the future of rugged luxury with the 2026 GMC Sierra 3500HD AT4, a truck engineered for those who demand more from their drive. Powered by the formidable 6.6L Duramax Turbo-Diesel V8, delivering an impressive 470 horsepower and 975 lb-ft of torque, this beast is ready to tackle any terrain with its robust 4x4 drivetrain and Off-Road High Clearance step. The AT4 Premium Plus Package ensures you're equipped with top-tier features, including a power sunroof and advanced Technology Package, featuring a multicolour 15-inch diagonal Head-Up Display and Rear Camera Mirror for unparalleled visibility.

Inside, the Sierra 3500HD AT4 offers a sanctuary of comfort and technology with leather bucket seats, heated and cooled for both front and rear passengers, and a 13.4-inch diagonal Premium GMC Infotainment System with Google built-in apps, ensuring seamless connectivity through wireless Android Auto and Apple CarPlay. Safety is paramount, with features like Blind Spot Monitor, Lane Departure Warning, and Front Collision Mitigation providing peace of mind on every journey. Whether towing with the Gooseneck/5th Wheel Prep Package or navigating urban landscapes, the Sierra 3500HD AT4 is your ultimate companion.