Price includes: $1000 - Purchase Allowance. Exp. 06/01/2026 Mark Allen Buick GMC is proud to offer this stunning-looking 2026 GMC Sierra 2500HD in Coastal Dune This vehicle has passed our comprehensive inspection and comes with the following features; AT4 2026 Coastal Dune GMC Sierra 2500HD 4D Crew Cab 4WD Duramax 6.6L V8 Turbodiesel 10-Speed Automatic, 4WD, Jet Black With Kalahari Accents Leather. Visit Our Team at Mark Allen Buick GMC To Get Started! Just 15 minutes north of Tulsa, near Collinsville, Skiatook Owasso & Oolagah. When you stop by our showroom, you'll get to speak with our team of professionals who are ready to guide you through every aspect of buying or owning a Buick, GMC model. Now that you know everything that we can do for you, come in and speak with us about what you need for your Buick Envision, Enclave, GMC Sierra 1500, Savana Cutaway 3500 and Acadia. Call 918-446-9696 or visit us at www.markallen-buick-gmc.com.