At Modern Auto Company, we strive to make our customers happy. Below, you can see our hours of operation, and also get step-by-step, driving directions from your doorstep to ours at Modern Auto Company. While you are at Modern Auto Company, you can see our extensive inventory of Buick, Cadillac, Chevrolet, GMC, and Pontiac vehicles. We work hard to get you into the vehicle you have always wanted. That new Buick, Cadillac, Chevrolet, GMC, or Pontiac is waiting for you, and we work with a wide variety of lending sources to make sure you will get the most complete and comprehensive car loan / auto financing package available in the Washington, Sullivan, Troy, St. Louis, O'Fallon, Festus areas.