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 another cellular area.
See also:
Navigating an iPod or USB Device on the Main Audio
Screen (Vehicles with a Navigation
System)
1. Press and release or
to select the next or previous track within the selected category.
2. Press and hold or
to move quickly through the tracks.
3. Press and release to move up one track w ...
Ejecting a Disc
CD (Eject): Press and release to eject the disc that is currently playing. The CD ejects from the bottom slot. A beep sounds and Ejecting Disc displays. Once the disc is ejected, Remove Disc displays ...
Comprehensive safety system
The GMC Acadia has a comprehensive safety system that is designed to protect
passengers before, during and after a crash. Its strong structure and four-wheel
independent suspension system enhance ...