2025 GMC Sierra 2500

GMC offers the 2025 Sierra HD in a versatile lineup of 7 trims: Pro, SLE, SLT, AT4, AT4X, Denali, and Denali Ultimate. Each presents a unique interpretation of rugged sophistication. At its core, the Pro trim is utilitarian—equipped with animated LED projector headlamps and a straightforward design tailored for hard work. The SLE and SLT introduce a more refined exterior language with rain-sensing wipers, signature LED taillamps, and functional enhancements like the MultiPro™ Tailgate and cab-mounted lighting—essentials for those long days at the job site. For off-road purists in Mississippi’s backcountry, the AT4 and AT4X elevate adventure-readiness with lifted suspensions, heavy-duty skid plates, and mud-terrain tires. The AT4X pushes boundaries further, offering up to 35-inch tires and advanced suspension geometry for exceptional ground clearance and rugged terrain control. At the pinnacle, Denali and Denali Ultimate embrace a luxury aesthetic rarely seen in this class. The Denali’s chrome accents and polished alloy wheels set an upscale tone, while the Denali Ultimate distinguishes itself with exclusive Vader Chrome detailing, illuminated power-retractable steps, and 20-inch ultra-bright machined wheels—signaling unmistakable presence on any road.

The 2025 Sierra HD gives buyers a choice between 2 muscular powerplants. The standard 6.6L gasoline V8 delivers 401 hp and 464 lbs.-ft. of torque—more than sufficient for most worksite demands or trailer pulls across hilly terrain. For maximum towing capacity and low-end grunt, the 6.6L Duramax® Turbo-Diesel V8 delivers a commanding 470 hp and 975 lbs.-ft. of torque. This torque-heavy powerhouse is paired with the proven Allison® 10-speed automatic transmission, engineered to withstand the extremes of hauling and payload stress with seamless gear shifts and controlled precision.

The Sierra HD excels under pressure. Whether in rear-wheel drive or equipped with 4WD capability, its platform is engineered to take on intense workloads and unforgiving conditions with confidence. When properly equipped, the turbo-diesel variant offers a towing capacity of up to 36,000 lbs.—ideal for fifth-wheel trailering or moving machinery across long distances. The ProGrade™ Trailering System ensures that towing is not just possible, but optimized, with features like Hitch Guidance and up to 14 available camera views—including an industry-first Transparent Trailer View—offering unmatched visibility and control. In off-road scenarios, particularly in AT4 and AT4X models, the Sierra HD’s specialized suspension, twin-tube shocks, and electronic locking rear differential provide remarkable articulation and composure over uneven ground.

Step inside and the Sierra HD’s cabin feels more executive office than work truck. Seating up to 6, the interior design balances comfort with command. Higher trims indulge with real aluminum and open-pore wood accents, while options like premium leather surfaces and multi-contour massaging front seats transform long hauls into relaxed journeys. The Denali Ultimate sets a new benchmark, featuring full-grain leather seating with 16-way adjustability, ventilation, heating, and massage functions. A topographical laser-etching of Mt. Denali in the open-pore wood trim reinforces the truck’s blend of rugged identity and bespoke luxury. At the center of it all is a 13.4-inch touchscreen infotainment display—largest in its class—paired with a customizable 12.3-inch digital gauge cluster. An optional 15-inch Head-Up Display projects navigation and key metrics right into the driver’s line of sight, while wireless Apple CarPlay®, Android Auto™, and available wireless charging ensure seamless connectivity.

GMC doesn’t just build trucks for power—they engineer them for peace of mind. Every 2025 Sierra HD comes equipped with the ProGrade™ Trailering System and a suite of standard driver assistance features including Forward Collision Alert, Automatic Emergency Braking, and Lane Departure Warning. Move into upper trims like the Denali and Denali Ultimate, and the suite expands to include Adaptive Cruise Control, Rear Cross Traffic Alert, and Surround Vision Camera technology. From tight city streets to the winding roads of Leake County, the Sierra HD keeps safety and awareness at the forefront.