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

Introducing the 2026 GMC Sierra 3500HD AT4, a truck engineered for those who demand more from their vehicle. With its robust L5P 6.6L Diesel engine, delivering an impressive 470 horsepower and 975 lb-ft of torque, this powerhouse is built for the toughest jobs and the most adventurous journeys. The AT4 Premium Plus Package enhances your drive with a power sunroof, high-clearance steps, and a 15-inch multicolour head-up display, ensuring you have everything you need at your fingertips.

Safety is paramount with features like Automatic Highbeams, Blind Spot Monitor, and Front Collision Mitigation, providing peace of mind on every drive. The Gooseneck/5th Wheel Prep Package equips you for heavy-duty towing, while the integrated tailgate step and bed liner add convenience and durability to your workday.

Inside, the Sierra 3500HD AT4 offers luxury and comfort with leather seats, heated and cooled front seats, and a 13.4" diagonal premium GMC infotainment system with Google built-in apps. Whether you're navigating city streets or rugged terrains, the Sierra 3500HD AT4 is your reliable partner, ready to tackle any challenge with style and strength.