Summit White 2024 GMC Sierra 3500HD AT4 4WD 10-Speed Automatic Duramax 6.6L V8 Turbodiesel.At Gjovik Chevrolet Buick GMC, We don't sell you a car, we help you buy a car! For over 55 years, proudly serving the towns of Sandwich, Yorkville, Plano, Somonauk, Oswego, Montgomery, Sugar Grove, Aurora, Sheridan, Ottawa, Dekalb, Naperville, and the surrounding Chicagoland and Midwest Illinois area. ... see more