OnStar

OnStar Corporation is a subsidiary of General Motors that provides subscription-based communications, in-vehicle security, hands-free calling, turn-by-turn navigation , and remote diagnostics systems throughout the United States, Canada, China, Mexico, Europe and Argentina. A similar service is known as ChevyStar in Latin American markets (except in Mexico and Argentina). In September 2011 the president of OnStar stated that the service had more than six million customers.