2026 GMC Sierra 2500 HD AT4

From the dealer

The 2026 GMC Sierra 2500HD AT4 is a powerhouse designed for serious work and adventure. This Silver beast features the legendary Duramax 6.6L V8 Turbodiesel engine paired with a 10-speed automatic transmission and 4WD capability, delivering impressive towing and hauling performance. The AT4 trim combines rugged capability with premium comfort and technology, making this truck ready for whatever you demand of it. - 6.6L V8 Diesel Turbocharged engine - 4WD with 2-Speed Active Transfer Case and Hill Descent Control - Multicolor 15 Head-Up Display with Trailer Viewing Software - Bose Premium 7-Speaker Sound System with SiriusXM 360L - Heated and Ventilated Perforated Leather Front Seats with 10-Way Power Adjustment - Spray-on Pickup Bedliner with Bed View Camera and HD Surround Vision - Wireless Phone Projection with Apple CarPlay/Android Auto - Off-Road High Clearance Step with Power-Retractable Assist Steps - Automatic Emergency Braking with Forward Collision Alert and Rear Cross Traffic Alert - Wireless Charging and Power Sunroof This AT4 Premium Plus Package truck comes equipped with premium leather seating, heated rear seats, and an array of technology features designed to enhance both capability and convenience. The advanced safety suite includes forward collision alert, automatic emergency braking, and trailer side blind zone alert. Off-road features like hill descent control and the X31 Off-Road Package suspension ensure this Sierra handles challenging terrain with confidence. Visit our showroom to experience the commanding presence and premium capability of this 2026 GMC Sierra 2500HD AT4 firsthand. The combination of diesel power, advanced technology, and rugged design makes this an exceptional choice for truck buyers seeking performance, comfort, and versatility.