OnStar by GM

The World's Most Comprehensive...

Welcome to the world's most comprehensive in-vehicle security, communications, and diagnostics system -- available on more than 50 GM models. With more than two million subscribers, OnStar is the leading provider of telematics services in the United States. Telematics is the transmission of data communications between systems and devices.

OnStar's in-vehicle safety, security, and information services use Global Positioning System (GPS) satellite and cellular technology to link the vehicle and driver to the OnStar Center. At the OnStar Center, advisors offer real-time, personalized help 24 hours a day, 365 days a year.