Welcome to Jim Winter Automotive Group, located in Jackson, Michigan with service to Lansing and Ann Arbor. Our inventory of new and used Buick, Cadillac and GMC cars, trucks and SUVs is online for your convenience, and our sales associates are only a call or email away if you have any questions. Looking for Jackson GMC and Jackson Buick dealers able to serve Lansing? Jim Winter is much more than just an Ann Arbor Cadillac, Lansing Cadillac and Jackson Cadillac dealership. We are proud to serve customers from Jackson MI to Lansing and even Ann Arbor with quality new and used Buick, Cadillac and GMC vehicles.