2025 GMC Sierra HD

Each trim has its own vibe and creates a unique road presence. The Pro trim lays the groundwork with rugged durability baked into its design. Move up the ladder to the SLE and SLT, and you start seeing added luxury details and convenience features. Things get sporty with the AT4 and AT4X. And then there’s the Denali and Denali Ultimate—trucks that whisper luxury with exclusive Denali design elements.

Let’s talk under the hood. You’ve got two engines to choose from. First, a 6.6L V8 gas engine with a stout 401 horsepower and 464 lbs.-ft. of torque. You can also choose from the 6.6L Duramax Turbo-Diesel with 470 horsepower and a pavement-twisting 975 lbs.-ft. of torque. Hook that to a 10-speed Allison® transmission and what you get is torque delivery that is extremely smooth. Whether you’re towing or just traveling around town, the Sierra HD doesn’t break a sweat.

Speaking of towing, this truck doesn’t mess around. Properly equipped, the Sierra 3500 HD offers max towing of up to 36,000 pounds. A suite of up to 14 camera views, including a transparent trailer view, means no more holding your breath every time you go to back into a tight spot. The off-road ability is serious, too. The AT4X brings a 1.5-inch factory lift and rear electronic-locking differential, as well as a larger steel transfer case skid plate.

Step into the Denali Ultimate and you’re treated to full-grain leather seats and 16-way power front seats with a comforting massage feature. A 13.4-inch touchscreen takes center stage, accompanied by a 12.3-inch digital instrument display and an available 15-inch Head-Up Display makes infotainment a breeze.

These trucks have got your back with a safety suite that has many advanced features included. Forward Collision Alert, Front Pedestrian Braking, Lane Departure Warning, and Automatic Emergency Braking are just the start. From the job site to the backroads around Greenville, the 2025 GMC Sierra HD proves that you don’t have to choose between muscle and cutting-edge features. Brown & Wood Buick GMC has the truck ready for your needs. Come visit to test drive a new Sierra HD.