2025 GMC Sierra 2500 HD

This ¾-ton Sierra is offered in trims that span from functional to lavish. The Pro establishes a durable foundation with purposeful design and utility, while still showing off animated LED signature lighting and a striking dark mesh grille. The SLE raises the standard with 17-inch machined-aluminum wheels and enhanced visibility features, while the SLT steps into a different realm with gloss-black 20-inch wheels, LED animated taillamps and fog lamps, rain-sensing wipers, and the MultiPro™ Tailgate. The AT4 amplifies off-road grit with skid plates, heavy-duty suspension, and red recovery hooks, but the AT4X pushes limits. Equipped with a factory lift, Multimatic® DSSV dampers, 35-inch mud-terrain tires, and locking rear differential, it’s ready for Wisconsin’s toughest trails. For a statement of sophistication, the Denali’s chrome detailing, wood accents, and premium finishes command attention, while the pinnacle Denali Ultimate indulges Milwaukee drivers with a Vader chrome grille, mirror-like 20-inch wheels, and the MultiPro™ Tailgate Audio system for an immersive experience inside and out. Every Sierra 2500 HD offers extensive customization and convenience options to suit your tastes and needs. ?

This truck offers uncompromising power with its 2 engine choices. The 6.6L V8 gasoline engine produces a robust 401 hp and 464 lbs.-ft. of torque, paired with a heavy-duty version of the renowned 10-speed Allison® automatic transmission. For maximum pulling power, the available 6.6L Duramax® Turbo-Diesel V8 generates 470 hp and an earth-moving 975 lbs.-ft. of low-end torque, engineered for towing heavy loads across Milwaukee jobsites or long hauls north toward Lake Country.?

The Sierra 2500 HD demonstrates why a ¾-ton truck is the backbone of serious work. A boxed-steel chassis, independent torsion-bar front suspension, and the Tow/Haul mode within the Traction Select System support a 36,000-lb. towing capacity when equipped with the diesel engine. Add the ProGrade™ Trailering System, up to 14 camera views including the innovative Transparent Trailer View, and the job is simple and safe.?Four-wheel drive availability, adaptive cruise control with trailering, and the innovative Transparent Trailer View make hauling through Milwaukee’s streets or Wisconsin’s backroads secure and stress-free. The cargo bed volume spans 69.5 to 83.5 cu. ft., and GMC’s exclusive MultiPro Tailgate adapts for step access, load stops, and even tailgate audio—an innovation that blends utility with convenience.?When venturing off-road, the AT4 and AT4X trims are fortified with brawny suspension, twin-tube shocks, and available e-locking differentials, ensuring you’ve got the protection and power to take on any obstacle.

Step inside, and the Sierra 2500 HD feels as much a luxury SUV as it does workhorse truck. The spacious Crew Cab delivers expansive, Best-in-Class head and legroom for 6 passengers. All trims are purposefully designed, ranging from durable cloth to Alpine Umber leather with embossed patterns, 16-way heated, ventilated, massaging front seats, and open-pore woodwork on the Denali Ultimate for those who crave luxury after a tough day. A 13.4-inch touchscreen gives access to wireless smartphone connectivity and Google Built-in, letting you connect with navigation, playlists, apps, and hands-free communication. Wireless charging and premium Bose® sound on higher trims defy the old “work truck” stereotype.?

A ¾-ton truck needs plenty of safety precautions and proactive systems, and the GMC Pro Safety suite comes standard on every 2025 GMC Sierra 2500 HD. Forward Collision Alert, Automatic Emergency Braking, Lane Departure Warning, Front Pedestrian Braking, IntelliBeam automatic high beams, Buckle-to-Drive, and a Following Distance Indicator work silently behind the scenes. Sierra HD Pro Safety Plus layers on Rear Cross-Traffic Alert, Trailer Side Blind Zone Alert, HD Surround Vision, and the Safety Alert Seat, funneling information through vibrations rather than intrusive chimes. The available 15-inch multicolor Head-Up Display keeps critical info in your sightline, because vigilance should never compete with the view over a hood this tall.??