For 1990-2009 cars

The "OnStar®" operation is actually a combination of many different technologies working together to form the OnStar® Service.

• | Cellular Telephone Equipment with Handsfree Audio Processing.

• | Cellular Data Modem.

• | Global Positioning System ( GPS) satellite navigation system.

• | GM Class 2 Electronic Communications between Vehicle Component Modules.

• | GM Universal Asynchronous Receiver Transmitter (UART) communications on vehicles with limited Class 2 communications.

• | Entertainment and Communications buss (E&C) Communication between vehicle entertainment and comfort modules.

• | Desktop computer software allowing the OnStar® Center advisors to send/receive data to the vehicle over the cellular modem.

• | Map software that allows the OnStar® Center to view the vehicle's exact location superimposed on a computer generated map.

• | Extensive database storage and retrieval capabilities to allow OnStar® Advisors the ability to quickly access requested information.