2025 GMC Sierra 3500 HD

The 2025 Sierra 3500 HD is available in several trims to suit different needs, from practical utility to luxury and off-road performance. The Pro trim focuses on functionality with robust essentials, as well as high-end animated LED projector headlamps and daytime running lamps with signature lighting. Customize this utilitarian trim with multiple packages from Snow Plow Prep to a Camper Package, and a long list of accessory options. The SLE trim adds sophistication with a18-inch machined aluminum wheels with Dark Grey accents, deep-tinted glass, and the highly functional EZ Lift Tailgate. The SLT brings more luxury features including rain-sensing wipers, the ProGrade Trailering System along with premium trailering mirrors, and upgraded LED lighting that extends to the signature taillamps, fog lamps, and cargo bed. The AT4 speaks to the adventurer, offering exclusive 20-inch gloss-black wheels with off-road tires, twin-tube Rancho® shocks, and skid plates. The AT4X amps up aggression, enhancing capability and luxury by offering American Expedition Vehicles-stamped steel bumpers, gloss-black Salta wheels, 35-inch Goodyear® Territory tires, and more rugged additions, coupled with lavish interior comforts. For real luxury, the Denali and Denali Ultimate trims provide a premium experience, indulging you with exclusive 20-inch Ultra-bright machined wheels with chrome or black inserts, a signature Vader Chrome grille, illuminated power assist steps, a MultiPro Tailgate Audio System, a power sunroof, and multiple packages that blend elegance and toughness the way only GMC can.

The 2025 Sierra 3500 HD offers 2 powerful engine options. The 6.6L V8 gas engine provides 401 hp and 464 lbs.-ft. of torque, ideal for daily work and recreational use. For serious muscle, the 6.6L Duramax® Turbo-Diesel V8 engine delivers 470 hp and a massive 975 lbs.-ft. of torque. Both engines are paired with an Allison® 10-speed automatic transmission, ensuring smooth shifts and optimal performance, whether hauling heavy loads or cruising down the highway.

The Sierra 3500 HD is built to handle the most demanding tasks. It can tow up to 36,000 lbs., providing best-in-class towing capabilities for trailers, boats, and large equipment. You can tow confidently with up to 14 camera views including a transparent trailer view, Adaptive Cruise Control with Trailering, and multiple integrated tools. The AT4X provides the ultimate in off-road equipment with Multimatic® DSSV dampers, a rear locking differential, oversized transfer case, and Hill Descent Control. With 11.6 inches of clearance, 31.6-degree approach and 25.7-degree departure angles, it dominates any landscape.

Inside the 2025 GMC Sierra 3500 HD, the focus is on comfort and luxury. Every trim is ergonomically designed with premium materials, from work-ready, weather-resistant cabins to the lavish Denali trims. The AT4X and Denali Ultimate truly indulge you with Best-in-Class 16-way heated, ventilated, massaging front seats in sumptuous leather, extra tech features, and exclusive touches. The GMC Premium Infotainment System with wireless smartphone connectivity, Google built-in, and up to a 13.4-inch touchscreen gives you access to apps, navigation, and your favorite playlists. The spacious cabin is designed for comfort and practicality, with ample legroom for passengers and a versatile cargo space to accommodate gear. The MultiPro Tailgate, available on higher trims, adds an extra layer of functionality including an exterior work surface to make every job easier.

The 2025 GMC Sierra 3500 HD is equipped with advanced safety features designed to keep everyone safe. Standard features include Forward-Collision Warning, Lane-Keeping Assist, and a rearview camera to enhance awareness. Available options such as Adaptive Cruise Control, Blind-Spot Monitoring, a Head-Up Display, and Rear Cross-Traffic Alert provide additional layers of protection, especially when towing or maneuvering in tight spaces. The truck’s robust frame, coupled with modern safety systems, ensures superior crash protection, making the Sierra 3500 HD one of the safest vehicles in its class.