Used 2026 GMC Sierra HD for sale in Castle Rock

Seller description

Experience the uncompromising power and capability of the 2026 GMC Sierra 2500HD AT4. This formidable truck is engineered to conquer any terrain, with a Duramax 6.6L V8 Turbodiesel engine delivering an exceptional 470 horsepower and 975 lb-ft of torque. - 6.6L V8 Diesel Turbocharged (Duramax) (B20-Diesel Compatible) (Includes (K05) Engine Block Heater) (470 hp [350.5 kW] at 2800 rpm, 975 lb-ft of torque [1322 Nm] at 1600 rpm) - AT4 Preferred Package - AT4 Premium Plus Package - Gooseneck/5th Wheel Prep Package - Preferred Equipment Group 4SB - Technology Package - X31 Off-Road Package - Bose Premium 7-Speaker Sound System - SiriusXM with 360L Trial Subscription - Steering Wheel Audio Controls - Electric Rear-Window Defogger - 120-Volt Bed Mounted Power Outlet - 120-Volt Instrument Panel Power Outlet - Push Button Start - Remote Vehicle Starter System - Universal Home Remote This Sierra 2500HD AT4 is engineered to excel both on and off the road. The advanced off-road suspension, 2-speed active transfer case, and hill descent control provide unparalleled traction and control, while the premium interior features like heated and ventilated front seats, a heated steering wheel, and a multicolor head-up display elevate your driving experience. With its robust capability, refined comfort, and cutting-edge technology, the 2026 GMC Sierra 2500HD AT4 is the ultimate choice for those who demand the best. Price includes: $1000 - Buick & GMC Consumer Cash Program. Exp. 06/30/2026 $500 - GM Military Cash Allowance Program. Exp. 01/04/2027