Conquer the Great Outdoors with the 2026 GMC Sierra 3500HD AT4: Power, Precision, and Premium Features for the Ultimate Off-Road Adventure

Step into the realm of unrivalled power and precision with the 2026 GMC Sierra 3500HD AT4. Designed for those who demand more from their truck, this powerhouse is equipped with a Duramax 6.6L Turbo-Diesel V8 engine, delivering an impressive 470 horsepower and 975 lb-ft of torque. Whether towing heavy loads or navigating rugged terrains, the Sierra 3500HD AT4 ensures you're always in control with its advanced 4x4 drivetrain and Locking/Limited Slip Differential. The AT4 Premium Plus Package elevates your driving experience with a power sunroof and Off-Road High Clearance Step, perfect for tackling challenging trails. Stay connected and informed with the 13.4" Diagonal Premium GMC Infotainment System, featuring Google built-in apps and wireless Android Auto and Apple CarPlay. Safety is paramount, with features like Blind Spot Monitor, Lane Departure Warning, and Front Collision Mitigation ensuring peace of mind on every journey. The interior offers luxury and comfort, with leather seats, heated and cooled front seats, and a multicolour 15" Diagonal Head-Up Display. The 2026 GMC Sierra 3500HD AT4 is not just a truck; it's a statement of strength and sophistication.