2025 GMC Sierra 2500 HD

With Pro, SLE, SLT, AT4, AT4X, Denali, and Denali Ultimate trim levels, the 2025 GMC Sierra 2500 HD lineup offers a truck for every need. LED headlights and chrome bumpers adorn the Pro. The SLE and SLT models sport 20-inch two-tone wheels. A 1.5-inch factory lift and Multimatic Dynamic Suspensions Spool Valve dampers prepare the AT4X for thrilling off-road adventures, while a six-function MutilPro Tailgate and other premium features are included on the Denali Ultimate. The AT4X and Denali Ultimate boast auto-extending power running boards.

A standard 6.6-liter V-8 gas engine generates 401 horsepower at 5,200 rpm and 464 pound-feet of torque at 4,000 rpm. This powertrain pairs with a 10-speed automatic transmission for towing with ease. The optional 6.6-liter Duramax Turbo-Diesel V-8 cranks out 470 horsepower at 2,800 rpm and a massive 975 pound-feet of torque at 1,600 rpm. This engine and its Allison-certified 10-speed automatic transmission deliver outstanding control with heavy loads. Its low-end grunt minimizes downshifts on hills. The tight gear spacing maintains the power band while climbing passes or navigating job sites.

Duramax-equipped crew cab models can tow up to 20,000 pounds, while regular cabs with fifth-wheel/gooseneck setups can pull 22,390 pounds. All versions have a 3,907-pound payload capacity. Hill-start assist prevents rollback, and trailer sway control keeps loads stable. The ProGrade Trailering System offers 15 camera views. Its Transparent Trailer tech virtually erases the trailer on screen, helping with backing up and lane changes.

The Sierra 2500 HD boasts a remarkably spacious cabin. Crew cab models lead their class with 43.03 inches of front headroom and 44.53 inches of legroom. The Denali Ultimate's 16-way power seats with massage function are perfect for long workdays. The SLT and higher trims have a 13.4-inch touchscreen with GMC's Premium Infotainment System and Google integration. A 12-speaker Bose Premium sound system delivers crystal-clear audio in the Denali and Denali Ultimate models. The latter also features the MultiPro Tailgate Audio System by KICKER. Intuitive controls allow drivers to adjust climate settings or navigate without distracting them from the road.

Every Sierra 2500 HD includes the HD Pro Safety suite with automatic emergency braking and lane departure warnings, delivering peace of mind for even the hardest workers. The available ProGrade trailering system offers hitch-guidance and -view features for no-spotter hookups and on-the-go connection checks. It'll even alert drivers if someone tampers with their trailer. The standard automatic high beams light up dark roads and dim for oncoming traffic. Whether hauling tools to a job site or towing a boat to the lake, the Sierra 2500 HD's remarkable features ensure a confident and comfortable driving experience.