2026 GMC Sierra 2500 HD

Pro keeps things focused. The 6.6L V8 gas engine, integrated trailering equipment, and durable materials give you a truck that’s ready to go straight to work in Quincy and surrounding Adams County areas. SLE builds in awareness. A 13.4-inch touchscreen and 12.3-inch driver display modernize the cabin, while additional camera views make towing easier to manage along Highway 61 or routes toward Payson and Camp Point. SLT adds comfort where it counts. Heated front seats, a heated steering wheel, and available ventilated leather seating make longer days more manageable, backed by the ProGrade® Trailering System. AT4 brings in off-road credibility. Rancho® shocks, skid plates, and all-terrain tires give it real traction beyond pavement, while the interior keeps things refined for adventures to nearby Lake Storey or the scenic Mississippi River bluffs. AT4X takes that further. Multimatic® DSSV dampers, 35-inch tires, locking differentials, and a factory lift turn it into a serious off-road setup. Inside, full-grain leather and available massaging seats push it into premium territory. Denali leans into refinement. Chrome detailing, real wood trim, and Forge perforated leather seating create a polished environment with advanced tech to match. Denali Ultimate sits at the top. A standard Duramax® diesel, Alpine Umber interior, 16-way power front seats with massage, and a Bose® 12-speaker system make it feel more like a luxury vehicle than a work truck, perfect for highway drives to Macomb, Hannibal, or Illinois scenic byways.

The 6.6L V8 gas engine produces 401 hp and 464 lbs. ft. of torque, paired with a 10-speed automatic transmission. It’s steady, predictable, and built for consistent workloads. The Duramax® 6.6L Turbo-Diesel V8 changes the experience. With 470 hp and 975 lbs. ft. of torque, it delivers a deep reserve of pulling power that you feel immediately under load. Towing reaches up to 22,380 lbs., putting it firmly in serious-duty territory. This is where the Sierra 2500 HD stands out. Not just capability, but composure at that capability. Even near its limits, the truck stays controlled. The chassis feels rigid, the steering remains predictable, and nothing feels unsettled when weight is involved. The ProGrade® Trailering System plays a big role here. Up to 14 camera views, including Transparent Trailer View, give you a clear picture of what’s happening around you. Adaptive Cruise Control with trailering adjusts for load, making long drives along I-72, US-24, or scenic Mississippi River routes far less tiring. Suspension tuning smooths out rough roads around Quincy, while off-road trims add hardware that lets you go further without hesitation.

Crew Cab models offer best-in-class front headroom and legroom, giving you space to settle in for longer drives along Quincy streets or Adams County backroads. Storage is practical. A large center console, under-seat compartments, and accessible storage areas keep tools and gear organized. As you move up trims, materials improve noticeably. Leather seating, real wood trim, and detailed finishes create a more refined environment. Denali Ultimate pushes it further with full-grain leather and available 16-way power front seats with massage, making long drives feel significantly easier whether commuting in downtown Quincy or heading toward the scenic riverfront.

Technology is clean and integrated. The available 13.4-inch touchscreen paired with a 12.3-inch Driver Information Center gives you a wide, configurable display for navigation, vehicle data, and trailering info. Wireless Apple CarPlay® and Android Auto™ come standard. Higher trims add a Bose® audio system and an available 15-inch Head-Up Display that projects key information directly into your line of sight. Everything ties back into trailering. Camera views, hitch guidance, and trailer monitoring are all handled within one system, making it easier to stay focused on highway trips to Macomb, Hannibal, or scenic drives along the Mississippi River corridor.

GMC Pro Safety comes standard, including Automatic Emergency Braking, Forward Collision Alert, Front Pedestrian Braking, Lane Departure Warning, Following Distance Indicator, and IntelliBeam® automatic high beams. Available features expand that coverage with HD Surround Vision, a Rear Camera Mirror, and additional trailering-focused systems that improve visibility when handling larger loads, ideal for Quincy, Adams County, and surrounding Illinois highways.