Butler GMC: At Your Service. It’s a simple motto, but it goes a long way for local customers seeking trusted new GMC sales, competitive used car pricing, dependable nearby auto service and more. Our GMC dealership in Charlton, MA, is a small-town business with a big heart, and we want to ensure that you can find the new GMC Sierra 1500 truck or used Acadia for your needs. Our brand-new Worcester County GMC dealership looks forward to welcoming you with a high-quality, community-focused experience you’ll appreciate.