Key Features of the 2026 GMC Sierra 2500 HD

Duramax® 6.6L Turbo-Diesel V8

The available Duramax® 6.6L Turbo-Diesel V8 is the beating heart of Sierra 2500 HD’s pulling power, delivering 470 horsepower and 975 lb.-ft. of torque. Matched to a 10-speed automatic transmission, this powertrain is tuned for low-rpm muscle and high-load stability on long grades. The gearbox’s closely spaced ratios help keep the engine in its optimal power band whether you’re accelerating with a trailer or using Tow/Haul mode in the Traction Select System. Pair the diesel with available Adaptive Cruise Control with trailering and you add smoother speed management on highways, even while towing. If your work regularly involves heavy equipment, livestock, or construction materials, the Duramax® delivers the kind of disciplined thrust and composure you want behind the wheel of a serious HD truck.

MultiPro™ Tailgate

The available MultiPro™ Tailgate is a genuine everyday advantage. Designed to do more than open and close, MultiPro™ offers flexible access points that make loading, unloading, and climbing into the bed easier. Its integrated step supports confident footing, while adjustable load stops help manage longer cargo safely. Whether you’re strapping down lumber or moving a toolbox, this tailgate helps you work faster and smarter. Add the available MultiPro Tailgate Audio System by Kicker® and you can bring clear, ruggedized sound to the jobsite or campsite without giving up valuable cab space. When a tailgate adds function, comfort, and entertainment, you notice it every single day.

Up to 14 Available Camera Views with HD Surround Vision

Trailering can be stressful—unless you can see it all. Sierra HD helps with up to 14 available camera views, including HD Surround Vision and Transparent Trailer View. With the right setup, you can get a virtual look through your properly equipped compatible trailer to check for vehicles or obstacles behind you. Hitch guidance and bed views make it easier to line up, while additional angles can help monitor trailer tires and blind spots. In tight yards or crowded job sites, those perspectives are confidence builders. Whether you’re reversing to a loading dock or threading a tight turn, the Sierra HD’s available camera tech reduces guesswork and removes much of the anxiety from big-truck maneuvering.

13.4" Diagonal Center Touchscreen and 12.3" Digital Driver Information Center

Inside, the Sierra 2500 HD is all business—with a refined approach. The 13.4-inch diagonal center touchscreen anchors the cabin with crisp graphics and quick responses, while the 12.3-inch digital Driver Information Center places the details you care about right in your line of sight. Wireless Apple CarPlay® and Android Auto™ come standard in the lineup, so your maps, calls, and playlists connect without a second thought. Available features like the 15-inch diagonal Head-Up Display add an extra layer of at-a-glance info that’s useful in traffic, on the highway, or at the job site. From trailering profiles in the In-Vehicle Trailering App to split-screen navigation and media, this tech suite helps keep you focused and efficient.

AT4X Off-Road Package with Multimatic® DSSV Dampers

If your days lead you off the beaten path, the AT4X specification adds serious off-road hardware without sacrificing HD capability. You get a factory-installed 1.5-inch suspension lift, Multimatic® DSSV dampers for precise control over rough terrain, a rear electronic-locking differential for traction, 35-inch Goodyear® Territory MT tires, and robust underbody protection with a larger steel transfer case skid plate and front aluminum skid plate. The result is a Sierra HD that feels planted and predictable on gravel, mud, and rutted access roads, yet remains composed and confident on pavement with a trailer in tow. For drivers who mix jobsite work, backroad access, and weekend exploration, the AT4X is an ideal balance of control and capability.