2026 GMC Sierra 2500 HD

Pro begins with the 6.6L V8 gas engine, durable cabin materials, and integrated trailering technology. SLE adds a 13.4-inch GMC Premium Infotainment System, 12.3-inch Driver Information Center, and expanded camera technology. SLT brings leather-appointed seating, heated front seats, a heated steering wheel, and ProGrade® Trailering technology. AT4 shifts the emphasis toward off-road capability with Rancho® monotube shocks, skid plates, all-terrain tires, and specialized suspension tuning. AT4X goes further with Multimatic® DSSV dampers, front and rear electronic locking differentials, 35-inch mud-terrain tires, and available 16-way power front seats with massage. Denali introduces Forge perforated leather and authentic wood trim, while Denali Ultimate combines a standard Duramax® Turbo-Diesel engine with Alpine Umber full-grain leather, massaging front seats, and Bose® Premium Audio.

The standard 6.6L V8 gasoline engine produces 401 hp and 464 lbs. ft. of torque. The available Duramax® 6.6L Turbo-Diesel V8 increases output to 470 hp and 975 lbs. ft. of torque. Both engines pair with an Allison® 10-speed automatic transmission, giving the Sierra 2500 HD a choice between naturally aspirated gasoline V8 power and the Duramax® engine’s substantial low-speed torque.

Properly equipped, the Sierra 2500 HD can tow up to 22,380 lbs. A high-strength frame and heavy-duty suspension provide the foundation for substantial hauling and trailering, while available 4WD adds traction for worksites, ranch roads, and uneven terrain around Stephenville. AT4 and AT4X introduce specialized suspension hardware for more demanding surfaces. ProGrade® Trailering technology offers up to 14 available camera views, including Transparent Trailer View, while available Adaptive Cruise Control with trailering accounts for the additional drag and stopping distance of a connected trailer.

Crew Cab configurations provide best-in-class front headroom and legroom, giving the Sierra 2500 HD generous space for long days behind the wheel. A large center console and under-seat compartments provide dedicated storage for smaller equipment and personal belongings. SLT introduces leather-appointed seating, while upper trims add heated and ventilated front seats and richer materials. Denali combines Forge perforated leather with authentic wood trim, and Denali Ultimate adds Alpine Umber full-grain leather and massaging front seats.

An available 13.4-inch infotainment touchscreen works alongside a 12.3-inch digital Driver Information Center, with wireless Apple CarPlay®, wireless Android Auto™, and Google built-in compatibility. Available Bose® audio and a Head-Up Display further develop the cabin, while integrated trailering tools and multiple camera perspectives assist with hitching, maneuvering, and monitoring a trailer.

Standard GMC Pro Safety includes Automatic Emergency Braking, Forward Collision Alert, Front Pedestrian Braking, Lane Departure Warning, Following Distance Indicator, and IntelliBeam®. Available HD Surround Vision, Rear Camera Mirror, Blind Zone Steering Assist, and Adaptive Cruise Control with trailering expand driver assistance during everyday travel and heavy-duty towing.