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

Step into the future of heavy-duty performance with the 2026 GMC Sierra 3500HD AT4, a truck engineered for those who demand power, precision, and luxury. Its robust 6.6L Duramax Turbo-Diesel V8 engine delivers an impressive 470 horsepower and 975 lb-ft of torque, ensuring you have the muscle to tackle any terrain or towing challenge. The 10-speed automatic transmission and 4x4 drivetrain provide seamless power delivery and control, making off-road adventures or heavy hauls a breeze.

Inside, the Sierra 3500HD AT4 offers luxury and technology to match its rugged exterior. Enjoy the comfort of heated and cooled leather bucket seats with memory settings, while the 13.4" diagonal premium GMC infotainment system with Google built-in apps keeps you connected and entertained. The multicolour 15" diagonal head-up display and rear camera mirror enhance visibility and safety, ensuring you have all the information you need at a glance.

With the AT4 Premium Plus Package, including power sunroof and off-road high clearance steps, this truck is ready for any adventure. The Gooseneck/5th Wheel Prep Package adds versatility for towing enthusiasts, making the Sierra 3500HD AT4 the ultimate choice for those who refuse to compromise.