2025 GMC Sierra HD

The 2025 GMC Sierra HD has seven trims: the Pro, SLE, SLT, AT4, AT4X, Denali, and Denali Ultimate. The Pro trim features a black grille, and on the SLE there are available chrome accents and 17-inch machined aluminum wheels. The SLT brings 18-inch machined aluminum wheels that have dark grey metallic accents.

Red recovery hooks and 20-inch gloss-black aluminum wheels are showcased on the AT4 model. The AT4X also showcases its capability with 35-inch Goodyear® Territory MT tires. A signature chrome grille, premium 20-inch Ultra-Bright machined wheels, and chrome exterior accents set the Denali apart. The Denali Ultimate has a Vader Chrome grille and illuminated power assist steps.

The Sierra HD offers robust powertrains. The standard 6.6-liter V-8 gas engine produces 401 horsepower and 464 pound-feet of torque, while the optional 6.6-liter Duramax Turbo-Diesel V-8 delivers 470 horsepower and 975 pound-feet of torque. Both engines pair with an Allison® 10-speed automatic transmission, optimizing power delivery for towing and daily driving.

The 3500 HD with the Duramax diesel engine leads the lineup with a maximum towing capacity of 36,000 pounds when equipped properly. The 2500 HD also offers impressive heavy-duty trailering capabilities, like the 2500 Crew Cab offering 21,870 pounds of maximum towing when properly equipped. You get advanced features to go along with your towing needs, like available Adaptive Cruise Control with Trailering and different camera views to enhance your towing experience.

A 13.4-inch center touchscreen and 12.3-inch digital instrument cluster are available for your entertainment and informational needs in your truck. You can add a 15-inch head-up display and luxurious features like 16-way power-adjustable front seats with massage functionality. The seats are also made of premium materials, such as on the Sierra HD Denali Ultimate with its Alpine Umber interior and leather seats.

The 2025 GMC Sierra HD lineup comes with the advanced safety technologies you need to travel to work and adventures securely. Forward collision alert, automatic emergency braking, following distance indicator, front pedestrian braking, and lane departure warning come standard across all trims. Get additional peace of mind with features like an available Bed View Camera, Front and Rear Park Assist, Lane Change Alert with Side Blind Zone Alert, and Rear Cross Traffic Alert.