Experience the ultimate in heavy duty capability and high end refinement with this Onyx Black 2021 GMC Sierra 3500HD Denali 4WD. With only 20841 miles, this low mileage one ton pickup is barely broken in and ready for the most demanding tasks. Under the hood lies the legendary 6.6L Duramax Turbo Diesel V8 engine paired with the world renowned Allison 10-speed automatic transmission, delivering a massive 445 horsepower and 910 lb-ft of torque. Whether you are hauling a massive fifth wheel or navigating a job site, the sophisticated 4WD system and Digital Steering Assist provide a composed and confident driving experience.The exterior is finished in a commanding Onyx Black, featuring the iconic Denali chrome grille, chrome recovery hooks, and signature 20 inch multi spoke polished aluminum wheels. This Crew Cab configuration offers a cavernous interior with premium materials throughout, including Forge Perforated Leather Appointed Seats that are both heated and ventilated. The cabin is a sanctuary of technology, centered around an 8 inch diagonal Premium GMC Infotainment System with Navigation, Apple CarPlay, and Android Auto. You will also enjoy the convenience of the 15 inch diagonal multicolor Head Up Display and the Rear Camera Mirror for enhanced visibility while towing.Utility is a top priority for this Sierra 3500HD, which comes equipped with the innovative GMC MultiPro Tailgate offering six unique functions for easier loading and access. The ProGrade Trailering System includes an In Vehicle Trailering App and an HD Surround Vision system with up to 15 camera views, making hitching and maneuvering large trailers effortless. Safety is well addressed with the Driver Alert Package II, featuring Forward Collision Alert, Lane Departure Warning, and Automatic Emergency Braking. From the premium Bose Seven Speaker Sound System to its rugged performance, this 2021 GMC Sierra 3500 Denali represents the gold standard of luxury work trucks.