7.2 KW Onboard Power
This 2026 GMC Sierra 2500HD AT4 combines serious capability with refined comfort for those who demand excellence from their truck. Built on the strength of the Duramax 6.6L V8 turbodiesel engine producing 470 horsepower and 975 lb-ft of torque, this truck delivers the performance you need whether you're working or exploring.
- Duramax 6.6L V8 Turbodiesel Engine with 470 hp and 975 lb-ft of torque
- 10-Speed Automatic Transmission with 2-Speed Active Transfer Case
- 4WD with Off-Road Suspension and Hill Descent Control
- X31 Off-Road Package for enhanced trail capability
- 7.2 kW Onboard Power with 120-Volt Bed and Panel Outlets
- Bose Premium 7-Speaker Sound System with SiriusXM and 360L Trial
- Bed View Camera with Trailer Camera Provisions and Trailer Side Blind Zone Alert
- Perforated Leather-Appointed Front Seats with Heating and Ventilation
- Heated Second Row Outboard Seats
- Spray-on Pickup Bedliner with GMC Logo
- HD Surround Vision and Ultrasonic Front and Rear Park Assist
- Wireless Charging and Wireless Phone Projection with Apple CarPlay and Android Auto
- Heated Steering Wheel and Heated Door Mirrors
- 20" High Gloss Black Aluminum Wheels
- Automatic Emergency Braking and Forward Collision Alert
The AT4 trim represents the pinnacle of GMC truck engineering, offering premium materials and thoughtful design throughout the cabin. Perforated leather seats with heating and ventilation keep you comfortable in any season, while the heated steering wheel and dual-zone automatic temperature control add another layer of refinement. The Preferred Equipment Group 4SB elevates your experience with advanced technology and convenience features.
Technology works seamlessly in this truck, designed to make your life easier. The premium GMC infotainment system integrates Apple CarPlay and Android Auto, while wireless charging and wireless phone projection keep your devices powered and accessible. Steering wheel audio controls let you manage your Bose sound system without taking your hands off the wheel, and the SiriusXM 360L trial subscription provides entertainment for the road ahead.
Safety and capability go hand-in-hand here. Automatic emergency braking, forward collision alert, rear cross traffic alert, and lane departure warning work together to help protect you and your passengers. The bed view camera with trailer provisions makes towing straightforward, while ultrasonic front and rear park assist takes the guesswork out of tight spaces. HD Surround Vision gives you complete visibility around the truck.
Off-road ready and daily-drive refined, this Sierra 2500HD AT4 represents the full spectrum of what a modern diesel truck can be. The X31 Off-Road Package pairs with the 2-Speed Active Transfer Case and hill descent control to handle challenging terrain with confidence. Engine block heating, a 220-amp alternator, and heavy-duty 80-amp battery ensure reliability in demanding conditions.
This truck is built to work hard and treat you well doing it. Whether your priorities are towing, hauling, off-road exploration, or simply commanding the road with unmistakable presence, the 2026 GMC Sierra 2500HD AT4 delivers on every front. We invite you to the showroom to experience this truck firsthand and discover why serious truck buyers choose GMC.
