OnStar is based at 400 Renaissance Center, Detroit, MI 48265. OnStar parent company is General Motors Corporation. The company provides subscription-based communications, hands free calling, in-vehicle security, remote diagnostics systems, as well as turn-by-turn navigation across the United States and Canada. The services provided by the company are available only for the vehicles by General Motors or have the correspondent factory-installed hardware. The company currently currently services about five million subscribers.
OnStar services are based on CDMA communication, mostly via Verizon Wireless and Bell Mobility, as well as location information using GPS technology. The company came onto the market in 1995 as a result of GM, Hughes Electronics Corporation and Electronic Data Systems cooperation. Please try to contact Onstar Customer Service directly prior to posting any complaints on this site.