See also:

Theft-Deterrent Feature
TheftLock® is designed to discourage theft of the vehicle's radio by learning a portion of the Vehicle Identification Number (VIN). The radio does not operate if it is stolen or moved to a di ...

Global Positioning System (GPS)
The navigation system determines the position of the vehicle by using satellite signals, various vehicle signals, and map data. At times, other interferences such as the satellite condition, road c ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if ...