888 431-6337 http://www.GaryLangAuto.com The Cadillac dealer to check out near Algonquin, IL is Gary Lang Cadillac in McHenry, IL. At Gary Lang Cadillac we do everything in our power to make sure you not only get the Cadillac vehicle of your dreams but also the great buying experience you deserve. For more information on a truly excellent Cadillac dealership call 888 431-6337 or visit http://www.GaryLangAuto.com. When you are in the Barrington, IL or Woodstock, IL areas, Gary Lang Cadillac is a great choice. 1107 S. Route 31 McHenry, IL 60050.