Key Features of the 2025 GMC Sierra 2500 HD

6.6L V8 Gas and Duramax 6.6L Turbo-Diesel V8

Every 2025 GMC Sierra 2500 HD puts power to the pavement through an Allison® 10-speed automatic transmission, tuned for confident gear selection whether you’re towing uphill or descending with a heavy load. The standard 6.6L V8 gas engine delivers robust output and predictable throttle response that many daily haulers prefer. For maximum torque and long-haul stability, the available Duramax 6.6L Turbo-Diesel V8 pairs with the same Allison 10-speed and is engineered to help the Sierra HD reach max available conventional tow ratings up to 20,000 lbs. and max available gooseneck/fifth-wheel ratings up to 21,870 lbs. on 2500 models. Together with a strong frame, available 2WD or 4WD, and carefully tuned cooling, these powertrains are designed to work hard without working you hard.

ProGrade® Trailering Tech with In-Vehicle Trailering App

Towing confidence begins before you roll. The available ProGrade® Trailering System and In-Vehicle Trailering App help you set up profiles for multiple trailers, complete pre-departure checklists, run trailer light tests from the cab, and track important metrics like mileage for service intervals. When you’re ready to hitch, available Hitch Guidance and camera-based aids help align your ball or gooseneck to the coupler more quickly, reducing trial and error. Add available Adaptive Cruise Control with trailering and the system can account for the added drag and braking distances when a trailer is connected. Whether you’re hauling equipment or a camper, these integrated tools make towing with the Sierra 2500 HD more intuitive day one and smarter over time.

Up to 13 or 14 Camera Views Including Transparent Trailer View

Visibility is confidence, especially with a trailer. Depending on trim and equipment, Sierra Heavy Duty offers up to 13 available camera views (and up to 14 on off-road and luxury models), including HD Surround Vision, Bed View Camera, Hitch View, and the available industry-first Transparent Trailer View. Transparent Trailer View can help show objects behind a compatible trailer, virtually “seeing through” it to assist with lane changes and maneuvering. Available trailering mirrors with power extension, retraction, and folding plus integrated lighting and auto-dimming upper glass further support your view. The result is a comprehensive camera ecosystem designed to help simplify close-quarters maneuvering and highway awareness when you’re towing.

Six-Function MultiPro™ Tailgate

Loading, unloading, and accessing the bed is easier with the available six-function MultiPro™ Tailgate. It offers a primary gate, a full-width inner gate for second-tier loading, a built-in load stop, and an inner-gate work surface. Fold the inner gate to create an easy step into the bed with an assist handle, and configure the load stop to secure longer materials. Pair it with the available MultiPro Tailgate Audio System by Kicker® on select trims to bring music to the worksite or campsite. Combined with Sierra HD’s generous cargo bed volume and available spray-on bedliner, the MultiPro Tailgate transforms the tailgate area into a versatile workspace and loading solution.

13.4-inch GMC Premium Infotainment with Google built-in

The SLE and SLT trims elevate your command center with a 13.4-inch diagonal GMC Premium Infotainment System featuring Google built-in compatibility, positioned next to a 12.3-inch digital Driver Information Center for at-a-glance vehicle data. Wireless Apple CarPlay® and wireless Android Auto™ help you access calls, texts, music, and maps without plugging in, while available Bose Premium Sound turns the spacious cabin into a concert-like environment. Available technologies like a multicolor 15-inch Head-Up Display on select models project key information into your line of sight, and the system’s thoughtful layout keeps trailering and camera controls within easy reach. This is tech that augments your capability rather than distracting from it.