General Motors Company is an American multinational automotive manufacturing company headquartered in Detroit, Michigan, United States. The company is most known for owning and manufacturing four automobile brands, Chevrolet, GMC, Cadillac and... Wikipedia
CEO: Mary Barra (Jan 15, 2014–)
Customer service: 1 (800) 462-8782
Headquarters: Detroit, MI
CFO: Paul A. Jacobson
CIO: Fred Killeen
President: Mark Reuss