See also:

Services Not Included in Roadside Assistance
Roadside Assistance does not cover or reimburse services for the following: - Events caused by fraud or bad faith by the driver. - Vehicle immobilization situations due to a major force or ...

Entering the Feature Settings Menu
1. Turn the ignition on and place the vehicle in P (Park). To avoid excessive drain on the battery, it is recommended that the headlamps are turned off. 2. Press the customization button to scroll ...

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 the v ...