http://www.GaryLangAuto.com When youre looking for a great Buick GMC dealership around Libertyville, IL come to Gary Lang Buick GMC, in McHenry. Gary Lang Buick GMC knows its important to provide an experience that keeps our Buick GMC customers coming back. Find out more about what makes us different at http://www.GaryLangAuto.com or call 888-479-2183 to speak to a friendly sales associate. Wherever you are in the Crystal Lake, IL/Libertyville area, you wont find a better dealership than Gary Lang Buick GMC. 1107 S. Route 31 McHenry, IL 60050.