Introducing the stunning 2026 GMC Sierra 3500HD AT4, resplendent in a pristine Summit White finish. This 4WD Crew Cab is designed to conquer any terrain with its exceptional off-road capabilities, powered by the AT4 PREFERRED EQUIPMENT GROUP and a mighty 6.6L Duramax Turbo-Diesel V8 engine offering 470 horsepower and an impressive 975 lb-ft of torque.Attention to detail is evident from the exterior with 20" High Gloss Black Aluminum Wheels and premium LT275/65R20 E BF Goodrich Off-Road tires, to the richly appointed Jet Black interior accentuated with Kalahari accents. Luxuriate in the comfort of perforated front leather bucket seats, perfect for long drives or heavy-duty tasks.The cutting-edge technology will exceed your expectations with a 13.4" GMC Infotainment System that’s equipped with Google apps, wireless Android Auto, and Apple CarPlay. The vehicle ensures your safety with advanced driver assistance features like lane assist, the Technology Package including a Rear Camera Mirror, and a 15" Multicolour Head-Up Display.Ideal for those seeking power and luxury, this truck is equipped with features such as adaptive cruise control, power-retractable assist steps, and all-weather floor liners. Whether you’re hauling a camper or a snow plow, the Sierra 3500HD is fully equipped to handle it. Contact Downtown Tyee Chevrolet Buick GMC Ltd. today to experience it yourself and learn more about its capabilities and unbeatable performance.