Founded in 1995, OnStar is a wholly owned subsidiary of General Motors Corporation that provides telematics services. The company serves more than 4 million subscribers in the United States and also in international locations. It provides specialized equipment for in-vehicle safety, security and communication services. OnStar provides a wide variety of service plans that include ride-assist and turn-by-turn navigation. It also assists clients in vehicle diagnostic checks and service scheduling. The company offers computerized navigation systems that provide voice-guided directions and locations to drivers. It also offer various advanced systems that can offer location-based weather and traffic reports. The company s Web site offers online information on payment schedules and service plans. OnStar is located in Detroit, Mich.