Gary Lang Auto Group, a premier Buick, Cadillac, Chevrolet, GMC, Kia, Mitsubishi, Subaru dealer. Gary Lang Auto Group Group is a new and used car dealership group on State Route 31 in McHenry serving the communities of Crystal Lake, Fox Lake, Round Lake, Spring Grove, Woodstock, Barrington, Libertyville, Huntley, Elgin and Schaumburg. Our full lineup