Key Features of the 2026 GMC Sierra 2500 HD

Duramax 6.6L Turbo-Diesel V8

The available Duramax 6.6-liter turbo-diesel V8 is the torque leader of the lineup, generating an impressive 470 horsepower and 975 lb-ft of torque. That output comes on early and stays accessible, making it ideal for pulling steep grades and maneuvering heavy trailers at low speeds. Mated to a 10-speed automatic, the Duramax delivers smooth, decisive shifts so the powertrain stays calm and effective under load. For shoppers who tow frequently, this powertrain is the heart of the Sierra 2500 HD’s appeal: it delivers stout acceleration, relaxed highway cruising, and the kind of power reserve that builds confidence when crosswinds, elevation changes, or long days stack up. If your daily routine includes trailers or payloads, this engine is the one to have.

10-Speed Automatic Transmission

Both available engines pair with a 10-speed automatic transmission designed to keep the Sierra 2500 HD in the optimal power band. With closely spaced ratios and intelligent programming, the transmission reduces hunting on grades and helps maintain steady momentum. Under throttle, it delivers crisp, well-timed shifts; under load, it prioritizes control and composure, which you feel in reduced gear searching and improved stability. When hitching or navigating tight areas, the smooth tip-in response and calm low-speed behavior make the truck easier to place. The pairing of a strong engine and a well-calibrated 10-speed is a big part of why this heavy-duty feels so composed.

15-View Camera System

Visibility turns a big truck into a manageable tool, and the available 15-view camera system is a standout advantage for towing and tight quarters. It can provide multiple perspectives around the truck and trailer, including hitch guidance views, bed view with zoom, surround views, and dynamic trajectory lines that help you place the truck precisely. The additional perspectives cut down on guesswork when aligning the hitch, monitoring cargo in the bed, or backing into a narrow driveway. When you’re moving equipment or launching a boat, the camera suite’s expanded situational awareness is more than a convenience — it’s a genuine confidence builder that many owners use daily.

MultiPro Tailgate

The MultiPro tailgate is a six-function tool that transforms how you use the bed. It integrates a primary gate, a load stop for longer items, a fold-down inner gate that doubles as a work surface, and steps to provide easier bed access. For everyday tasks like loading lumber, securing recreational gear, or setting up an on-site workspace, the MultiPro tailgate helps the Sierra 2500 HD do more without extra accessories. Add the bed’s built-in corner steps, available LED lighting, movable tie-downs, and an available 120-volt outlet, and the truck’s cargo area becomes a highly functional workstation that supports both productivity and recreation.

13.4-Inch Touchscreen with Google Built-in

Inside, clarity and control start with the available 13.4-inch touchscreen that anchors the cabin. With Google Built-in, you can access Google Assistant, Google Maps, and Google Play directly, while wireless Apple CarPlay and Android Auto provide seamless smartphone integration. Many configurations also include a 12.3-inch digital driver display for at-a-glance vehicle data. The large central screen cleanly displays trailering checklists, camera views, and navigation, which is particularly helpful when towing. Combined with available premium audio and durable, well-finished materials, the Sierra 2500 HD’s cabin blends modern tech with a clean, functional layout that supports long days in the saddle.