Gary Lang Buick GMC provides the best selection of featured new Buick and GMC vehicles in McHenry, IL and the surrounding areas at competitive pricing. Be sure to check out our latest specials on new Buick cars and GMC trucks and our ever-changing inventory of new Buick and GMC vehicles too! Can't find what you're looking for? We'd love to help. Call or stop by our car dealership in McHenry, IL and one of sales experts will help you find what you're looking for!