This Onyx Black 2021 GMC Sierra 3500 HD AT4 delivers a commanding presence and heavy duty performance for those who need a truck that works as hard as they do. Featuring the 172" wheelbase and a spacious crew cab configuration, this long bed powerhouse provides maximum stability and cargo room for your most demanding tasks. Despite having 138,476 miles, this Sierra continues to showcase the legendary durability and capability expected from the GMC brand, making it a reliable choice for towing, hauling, or navigating rugged terrain.The AT4 trim elevates the driving experience with a specialized off road suspension featuring Rancho shocks, high gloss black accents, and signature red recovery hooks. Inside, you are greeted by a premium Jet Black leather interior with Kalahari accents that includes high end comforts like heated and ventilated front seats, a heated steering wheel, and all weather floor liners. Advanced technology such as the GMC Infotainment System with wireless smartphone integration and HD Surround Vision ensures you stay connected and confident whether you are on the job site or the highway.Practicality meets innovation with the inclusion of the GMC MultiPro Tailgate, offering six unique functions to improve loading and bed access. This 3500 HD is also equipped with power vertical trailering mirrors and a comprehensive trailering package, ensuring that even the heaviest loads are handled with precision. Whether you are tackling a North Dakota winter or heading off the beaten path, this 4WD Sierra 3500 HD AT4 offers the perfect balance of rugged strength and sophisticated luxury.