See also:

Driver Safety Belt Reminder Light
There is a driver safety belt reminder light on the instrument panel cluster. When the vehicle is started, this light flashes and a chime may come on to remind the driver to fasten their safety bel ...

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 vehic ...

Security Light
The security light should come on briefly as the engine is started. If the system is working normally, the indicator light turns off. If it does not come on, have the vehicle serviced by your dealer ...