Brief description: General

NOTE: Certain services require that a supplementary subscription has been taken out with OnStar.

OnStar is a telemetry system which is equipped with a mobile phone and GPS receiver that, in conjunction with the other car electronics, facilitates a number of services. The system can:

Automatically telephone for assistance if the front airbags are activated.
Assist with navigation to a particular address and inform the driver of the car's position.
Ring for the police, fire services or send EMS messages if required.
Give assistance and ring for help if there is a fault in the car, if a tyre is punctured or if the car has run out of petrol
Make bookings for hotels and restaurants etc.
Give advice when planning holiday journeys.
Make personal telephone calls at the press of a button.
Activate the horn and hazard warning lights if the car should be difficult to locate, e.g. in a large car park.

The system contains two units VCIM (Vehicle Communication Interface Module) and OIM (OnStar Interface Module) which communicate with each other via an internal bus. The system is connected to the radio, microphone, control button unit, GPS/mobile phone antenna, airbag control module, horn, hazard warning lights and the data link connector.