As of January 2015, the corporate office address of the General Motors Company is 300 Renaissance Center, Detroit, Michigan, 48265. The mailing address is P.O. Box 33170, Detroit, Michigan, 48232-5170. The phone number of the GM corporate office is (313) 556-5000. The company employs over 212,000 workers around the world.
General Motors manufacture a variety of vehicles through different brands, including Chevrolet, Buick, GMC, Cadillac, Pontiac and Saturn. For Chevrolet customer assistance, call (800) 222-1020; for Buick, call (800) 521-7300; for GMC, call (800) 462-8782; for Cadillac, call (800) 458-8006; for Pontiac, call (800) 762-2737; and for Saturn, call (800) 553-6000.