See also:

CD Player Messages
CHECK DISC: If this message displays and/or the CD ejects, it could be for one of the following reasons: • It is very hot. When the temperature returns to normal, the CD should play. • The road ...

Engine Oil Life System
The engine oil life system calculates engine oil life based on vehicle use and displays the CHANGE ENGINE OIL SOON message when it is time to change the engine oil and filter. The oil life system ...

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 ...