2026 GMC Sierra 2500HD Review

The GMC Sierra 2500HD brings muscle in all the right ways. Standard power comes from a 6.6L V8 gas engine paired with a 10-speed automatic transmission, offering strong, steady performance that feels ready for daily work or weekend hauling.

Drivers looking for maximum capability can step up to the available Duramax® 6.6L Turbo-Diesel V8, producing 470 horsepower and an impressive 975 lb-ft of torque. That kind of output translates into confident towing, smooth acceleration under load, and a truck that feels planted even when fully hooked up.

Paired with GMC's trailering technologies, the Sierra 2500HD makes hitching, hauling, and backing up feel more controlled and less demanding, especially when hauling large trailers or equipment.

Inside the Sierra 2500HD, the focus stays on comfort, visibility, and intuitive tech. The layout feels clean and functional, with controls placed right where you expect them. Wireless Apple CarPlay® and Android Auto™ come standard, making it easy to stay connected on the road or at the job site.

Higher trims bring in larger digital displays, upgraded materials, and thoughtful touches that make long drives more enjoyable. The available MultiPro™ Tailgate adds flexibility when loading gear, managing tools, or setting up a mobile workspace.

Crew Cab models offer generous passenger space, making the Sierra 2500HD just as practical for team travel or family use as it is for workdays.

Driving a heavy-duty truck comes with big responsibilities, and the Sierra 2500HD supports that with modern safety and driver-assistance features. Standard technologies include automatic emergency braking, lane departure warning, and automatic high beams, helping drivers stay alert and aware.

Available camera views and trailer assistance features add another layer of confidence, especially when maneuvering in tight spaces or navigating busy roads with a trailer attached. These tools work quietly in the background, supporting the drive without getting in the way.

Quality and durability matter in a truck built to handle demanding work. Industry insights from J.D. Power's 2024 U.S. Vehicle Dependability Study for Large Heavy-Duty Pickups highlight the importance of long-term reliability, owner satisfaction, and engineering consistency in this segment.*

The Sierra 2500HD reflects that focus with a solid build, proven powertrains, and thoughtful design details meant to hold up over years of use. It's the kind of truck drivers choose when they want confidence, not just today, but well down the road.