2025 GMC Sierra 2500

The 2025 Sierra 2500 is available in a strong lineup of trims, including Pro, SLE, SLT, AT4, AT4X, and Denali Ultimate. Each trim offers a distinct look, from the bold chrome accents of the SLT to the rugged blacked-out aesthetic of the AT4 and AT4X. LED headlamps and signature taillights come standard across the lineup, while higher trims boast animated lighting and power-retractable assist steps. You’ll find a variety of wheel designs up to 20 inches, including machined aluminum and gloss black finishes. The Denali Ultimate brings premium touches like a Vader chrome grille and unique badging. With options like power-folding trailering mirrors and the MultiPro Tailgate, form meets function seamlessly. Every Sierra 2500 trim showcases a purpose-driven design meant to enhance capability and presence on the road.

Under the hood, the Sierra 2500 offers two serious engine choices, each ready for heavy-duty demands. The standard 6.6L V8 gas engine delivers 401 horsepower and 464 lb-ft of torque, paired with a 10-speed automatic transmission for smooth shifts and better towing control. For drivers who need even more strength, the available 6.6L Duramax Turbo-Diesel V8 generates 470 horsepower and a commanding 975 lb-ft of torque. This diesel engine is also mated to a 10-speed Allison transmission, engineered for high torque output under load. Both engines are optimized for dependable performance and low-end power, especially when hauling or towing large trailers. GMC’s engineering ensures confident acceleration, stability, and pulling power. These engines are built for long-term durability, even under extreme work conditions.

The 2025 Sierra 2500 delivers heavy-duty performance with advanced engineering that makes tough jobs easier. With a max available towing capacity of up to 22,070 pounds when properly equipped, it stands as one of the strongest in its class. Features like the available Transparent Trailer View, Adaptive Cruise Control with trailering, and Trailer Sway Control add confidence on the move. Off-road performance is enhanced in the AT4 and AT4X models with skid plates, off-road suspension, and Multimatic DSSV dampers. The truck’s chassis and suspension are fine-tuned for towing stability, even over long hauls or uneven terrain. Hill Descent Control and selectable drive modes further support varied driving conditions. Whether towing a fifth-wheel trailer or navigating muddy backroads, this truck delivers the control and strength professionals demand.

Inside, the Sierra 2500 combines comfort with high functionality, offering a cabin tailored for work and travel. The available 13.4-inch center touchscreen and 12.3-inch driver information display provide a fully digital, customizable command center. Apple CarPlay, Android Auto, Google built-in, and available head-up display keep you connected and informed without distraction. Materials range from durable cloth on work-ready trims to full-grain leather and real wood accents in Denali Ultimate. A spacious center console, wireless charging pad, and multiple USB ports add everyday practicality. Sound insulation and active noise cancellation enhance ride comfort, even during highway driving. Heated and ventilated front seats, along with a heated steering wheel, add comfort during New Hampshire winters. Every inch of the cabin is designed to meet the needs of drivers who spend serious time behind the wheel.

Safety in the 2025 Sierra 2500 is reinforced with a full suite of advanced driver-assist technologies. GMC Pro Safety comes standard, offering Forward Collision Alert, Lane Departure Warning, Automatic Emergency Braking, and more. Available features like HD Surround Vision and Rear Camera Mirror provide added visibility when parking, towing, or navigating tight areas. Front and Rear Park Assist, along with available Bed View Camera and Trailer Side Blind Zone Alert, enhance control in all directions. The AT4X and Denali Ultimate trims offer the most complete safety and driver awareness systems. Teen Driver technology and trailer safety features allow for more secure handling whether you're hauling cargo or letting someone else take the wheel. The structure itself is designed for durability and collision performance, keeping all passengers protected. This truck is built not just to work hard—but to help keep you safe every mile.