The 2020 GMC Sierra 2500HD AT4 is a powerful and refined heavy-duty pickup designed to handle demanding work while delivering premium comfort. Equipped with the renowned Duramax 6.6L turbo-diesel engine, this truck offers exceptional towing capability, impressive torque, and long-lasting reliability—making it ideal for both job sites and long hauls. This AT4 trim stands out with its off-road-ready design, featuring a factory lift, skid plates, and a rugged suspension system that allows it to confidently tackle rough terrain. The bold exterior styling is complemented by signature AT4 accents, giving it a commanding presence on and off the road. Inside, the Sierra 2500HD AT4 blends durability with upscale features. The cabin offers premium materials, comfortable seating, and modern technology, including an intuitive infotainment system, advanced driver-assist features, and connectivity options to keep you in control and entertained wherever you go. This particular truck has had two previous owners and comes with 18 service records reported to Carfax, reflecting consistent maintenance and care over its lifetime. With a strong service history and proven performance, this Sierra 2500HD AT4 is a dependable and capable truck ready for its next owner. Whether you need serious towing power, off-road capability, or everyday comfort, this Duramax-powered Sierra delivers on all fronts.