List of Buick GMC Stores in Alton, IL Outlet Note Regular Brands Buick GMC Illinois Alton Rating 4.6 based on 93 votes Official Website http://www.chevrolet.com Products Cars Car Deals Automotive NameAddressPhone Name/Address/Phone Buick GMC outlet - Alton 1620 Homer Adams Pkwy (618) 988-0020 People Also Viewed