New 2026 GMC Sierra 3500 HD AT4 For Sale Warrenton, VA

Meet the 2026 GMC Sierra 3500HD AT4, a premium heavy-duty truck engineered for those who demand capability, comfort, and confidence on any job or adventure.- Duramax 6.6L V8 Turbodiesel engine with 470 horsepower and 975 lb-ft of torque- 10-Speed Automatic transmission with 4WD and 2-Speed Active Transfer Case- Bose Premium 7-Speaker Sound System with SiriusXM 360L- Premium GMC Infotainment System with 13.4-inch diagonal display- HD Surround Vision with Bed View Camera and Trailer Camera Provisions- Heated and ventilated front seats with 10-way power adjustment and lumbar support- Heated steering wheel and heated rear seats- Automatic Emergency Braking, Forward Collision Alert, and Lane Departure Warning- Ultrasonic Front and Rear Park Assist with Trailer Side Blind Zone Alert- AT4 Preferred Package and X31 Off-Road Package- Spray-on Pickup Bedliner with GMC Logo- 20-inch High Gloss Black 8-Spoke Aluminum wheels- Wireless charging and Wireless Phone Projection- Power Sunroof with power sliding rear windowThe Duramax diesel heart of this Sierra 3500HD delivers exceptional torque for towing and hauling, while the engine block heater and exhaust brake provide added utility in demanding conditions. The 10-speed transmission works seamlessly with the 4WD system and active transfer case to optimize performance whether you're on the highway or tackling challenging terrain.Step inside and discover a cabin that prioritizes both driver comfort and modern convenience. Heated and ventilated front seats with lumbar support adjust via 10-way power controls, while the heated steering wheel and rear seats extend comfort throughout the cabin. The dual zone automatic climate control maintains your preferred temperature, and the power sunroof adds an open-air dimension to your driving experience.Technology keeps you connected and safe. The premium infotainment system features wireless phone projection, a wireless charging pad, and navigation integration. The HD Surround Vision system includes cameras that provide bed and trailer views, while automatic emergency braking, forward collision alert, and rear cross traffic alert work proactively to enhance safety. Ultrasonic park assist and trailer guidance systems take the guesswork out of maneuvering.The AT4 and X31 Off-Road packages equip this Sierra with specialized capability. Hill Descent Control, all-terrain suspension tuning, and the 2-speed active transfer case ensure you can handle rugged landscapes. The heavy-duty 80 amp-hour battery and dual alternators provide the electrical capacity for the work ahead.Built with premium materials and thoughtful details, the gray exterior sits on 20-inch High Gloss Black aluminum wheels, while the spray-on bedliner with GMC logo protects your cargo area. LED cargo lighting, heated power mirrors, and rain-sensing wipers add practical refinement to every outing.This 2026 Sierra 3500HD AT4 represents the convergence of capability, comfort, and technology—a truck ready to serve your ambitions while treating you to the comfort you deserve.