http://www.GaryLangAuto.com The Buick GMC dealer to check out in the Libertyville area is Gary Lang Buick GMC in McHenry, IL. When you come to Gary Lang Buick GMC, you know that our trustworthy staff will do whatever it can to make your visit pleasurable. Find out more about the Gary Lang Buick GMC experience at http://www.GaryLangAuto.com, or call us today at 888-479-2183. Huntley, IL or Libertyville is just a short distance from Gary Lang Buick GMC. 1107 S. Route 31 McHenry, IL 60050.