** 5148 GVM ** The 2021 GMC Sierra 2500HD Denali is the ultimate blend of power, luxury, and capability. Built to handle the toughest jobs, it boasts a 6.6L Duramax turbo-diesel engine delivering 445 horsepower and an earth-moving 910 lb-ft of torque. Whether you are towing a heavy trailer or conquering off-road terrain, the Sierra 2500HD is engineered to perform with confidence. Inside, the Denali trim offers premium leather seating, real wood accents, and cutting-edge technology. The signature MultiPro tailgate adds versatility, making loading and unloading effortless. If you are looking for a truck that works as hard as you do, while keeping you wrapped in first class comfort, the Sierra 2500HD Denali is your answer.factory 5th wheel preped