2026 GMC Sierra 2500 HD AT4 for Sale in Matteson #T260588

Text 815-446-7319 for questions or to schedule a test drive.Text questions directly to sales at (815) 446-7319.Feel the Arnie Bauer Advantage: Trusted Family-Owned Values Since 1945. At Arnie Bauer, we believe in empowering our customers with transparent pricing, great service, and unmatched peace of mind. As a family-owned and operated dealer since 1945, we take pride in treating our customers like family, ensuring you receive the care and attention you deserve. Enjoy the confidence of our free lifetime engine coverage and trust that we never engage in price gouging, providing you with the best value for your hard-earned dollar. With two convenient locations, your journey to a new ride is not just a transaction—it's a relationship built on trust and joy. At Arnie Bauer, your dollar has more power.Onyx Black Heavy-Duty GMC Truck for Sale in Wilmington, IL Looking for a 2026 GMC Sierra 2500HD AT4 Duramax for sale near Joliet, Morris, Plainfield, Coal City, or Wilmington, IL? This new GMC Sierra 2500HD AT4 4WD in Onyx Black with a Jet Black interior and distinctive Kalahari accents is built for drivers who demand serious towing capability, premium comfort, advanced technology, and off-road confidence. Available now at Arnie Bauer GMC in Wilmington, Illinois, this heavy-duty diesel truck is engineered to handle demanding jobs, large trailers, and weekend adventures with ease.At the heart of this Sierra 2500HD AT4 is the legendary Duramax® 6.6L Turbo-Diesel engine, delivering the power and torque truck buyers need for towing campers, fifth-wheel trailers, equipment haulers, horse trailers, and heavy loads. Combined with a 4WD system, 2-speed Autotrac transfer case, Auto-Locking Rear Differential, Trailering Package, Trailer Brake Controller, and Gooseneck/5th Wheel Prep Package, this GMC HD truck is ready for work from day one.Built for both rugged terrain and everyday comfort, the AT4 trim features skid plates, all-terrain tires, red front recovery hooks, Traction Select System with Off-Road and Tow/Haul Modes, heavy-duty air cleaner, digital variable steering assist, and StabiliTrak with Trailer Sway Control.The AT4 Premium Plus Package elevates the cabin with premium amenities including heated and ventilated front bucket seats, heated rear outboard seats, dual-zone automatic climate control, premium floor liners, a power sunroof, power-retractable assist steps, a power sliding rear window, and a Universal Home Remote. Driver memory settings, a heated steering wheel, and a spacious rear seat with integrated storage add even more ease.Technology is front and center with GMC's 13.4-inch Premium Infotainment touchscreen featuring Google Built-In, wireless Apple CarPlay®, wireless Android Auto™, integrated navigation capability, Bose® Premium Audio, a 12.3-inch digital Driver Info Center, and the Ride Trailering App. The Technology Package adds a Rear Camera Mirror and a Multi-Color Head-Up Display to help keep important info within view while driving or towing.Searching for a GMC truck with advanced safety and trailering technology? This Sierra 2500HD AT4 includes Forward Collision Alert, Automatic Emergency Braking, Front Pedestrian Braking, Lane Departure Warning, HD Surround Vision, Front and Rear Park Assist, Rear Cross Traffic Alert, Trailer Side Blind Zone Alert, Safety Alert Seat, IntelliBeam® automatic high beams, and additional driver-help technologies designed to increase confidence on the road.The bold exterior is highlighted by animated LED projector headlamps, LED fog lamps, LED cargo area lighting, power-folding and extending heated trailer mirrors, a spray-on bedliner, GMC MultiPro Tailgate, rear wheelhouse liners, and LED roof marker lamps. Finished in striking Onyx Black, this Sierra 2500HD AT4 delivers an aggressive appearance that match