Thank you for visiting Coleman Buick GMC Cadillac. Located in Lawrenceville, NJ, we are proud to serve as a premier Cadillac dealer in New Jersey. We also serve the Trenton and surrounding area as a trusted GMC and Buick dealer. With competitive prices, and a friendly atmosphere, we offer you a professional staff that is committed to selling without the pressure you tend to see at other dealerships. New Jersey Buick GMC Cadillac, Hamilton GMC Buick Cadillac and New Jersey Cadillac, and Ewing Buick GMC Cadillac dealer. With competitive prices, and a friendly atmosphere, we offer you a professional staff that is committed to selling without the pressure you tend to see at other dealerships.