"Text 815-446-7319 for questions or to schedule a test drive. Text questions directly to sales at (815) 446-7319. ""Experience the Arnie Bauer Advantage: Trusted Family-Owned Values Since 1945."" At Arnie Bauer, we believe in empowering our customers with transparent pricing, exceptional service, and unmatched peace of mind. As a family-owned and operated dealership 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 warranty 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 vehicle is not just a transactionit's a relationship built on trust and satisfaction. At Arnie Bauer, your dollar has more power. If you want a heavy-duty truck that feels just as premium as it is powerful, this 2026 GMC Sierra 2500HD Denali Ultimate at Arnie Bauer GMC in Wilmington, IL is the kind of truck that instantly gets attention. Finished in stunning Downpour Metallic with a rich Alpine Umber interior, this 4WD Sierra HD combines luxury, capability, and serious diesel performance in a way very few trucks can. It has the bold stance people want in a heavy-duty pickup while still delivering the upscale comfort and technology drivers expect from GMCs top-tier Denali Ultimate trim. Under the hood, the legendary Duramax 6.6L Turbo-Diesel V8 paired with the Allison 10-speed automatic transmission gives this Sierra the kind of towing power and torque truck owners rely on every day. Whether youre hauling a large trailer, towing equipment across Illinois, or heading out on a long-distance trip, this truck is built to handle it confidently and comfortably. Inside, the Denali Ultimate feels more like a luxury SUV than a work truck. The Alpine Umber interior gives the cabin a high-end look and feel that immediately stands out. Heated and ventilated seats, massage front seats, premium materials throughout the cabin, and advanced technology make this a truck you genuinely enjoy spending time in whether youre driving across town or across the country. The technology in this Sierra HD is designed to make towing and everyday driving easier. Features like the HD Surround Vision camera system, trailer camera provisions, adaptive cruise control, head-up display, and GMCs advanced trailering technology help give drivers more confidence behind the wheel. The MultiPro Tailgate, power retractable assist steps, and spray-on bedliner also make loading cargo and accessing the truck more convenient in real-world situations. Drivers shopping for a GMC Sierra 2500HD Denali Ultimate near Wilmington, Joliet, Morris, Coal City, or throughout the Chicagoland area are often looking for a truck that can tow like a heavy-duty pickup while still delivering the refinement and comfort of a luxury vehicle. This Sierra does exactly that. If you are looking for a new GMC Sierra 2500HD Denali Ultimate for sale in Wilmington, IL, visit Arnie Bauer GMC today. Our team can help with financing, trade-ins, online shopping, and nationwide delivery options to make your buying experience simple and convenient. This is the kind of truck people search for when they want capability without sacrificing comfort. Powerful, refined, premium, and built to handle whatever comes next."