New 2026 Gmc Sierra 3500 HD Denali Ultimate

The 2026 GMC Sierra 3500 HD DRW Denali Ultimate delivers unmatched capability and luxury in a heavy-duty truck. Powered by the legendary 6.6L Duramax Turbo-Diesel V8 paired with the Allison 10-speed automatic transmission, it produces 470 horsepower and 975 lb-ft of torque for confident towing and hauling. The Gooseneck/5th Wheel Prep Package equips the truck with a factory-installed hitch platform, stamped box holes, and a bed-mounted 7-pin harness, making it ready for serious trailering. Built on a fully boxed frame with heavy-duty cooling, skid plates, and an exhaust brake, the Sierra 3500 is engineered to perform under the toughest conditions. Inside, the Denali Ultimate trim surrounds you with premium leather seating, real wood and metal accents, and advanced technology, creating a first-class cabin that makes even the longest hauls comfortable and connected.