See also:

Battery Power Protection
This feature shuts off the dome lamps if they are left on for more than 10 minutes when the ignition is in LOCK/OFF. This helps to prevent the battery from running down. ...

When the System Does Not Seem to Work Properly
The following messages may be displayed on the DIC: SERVICE PARKING ASSIST: If this message occurs, take the vehicle to your dealer to repair the system. PARK ASSIST OFF: If the UFRPA system ...

TTY Users
OnStar has the ability to communicate to the deaf, hard–of–hearing, or speech–impaired customers while in the vehicle. The available dealer–installed TTY system can provide in-vehicle acces ...