See also:

How to Detect a Tamper Condition
If  is pressed and the horn sounds, an attempted break-in occurred while the system was armed. If the alarm has been activated, a message will appear on the DIC. See Anti-theft Alarm ...

Unable to Connect to OnStar Message
If there is limited cellular coverage or the cellular network has reached maximum capacity, this message may come on. Push to try the call again or try again after driving a few miles into ...

Radio Menus (Radio with CD and Touchscreen)
Tone Menu To access the sound menu, press the TONE button. Use the sound menu to adjust the following features: Bass Middle Treble EQ Fade Balance Setting the Tone To adjust the ba ...