Using the Delete All Name Tags Command
The delete all name tags command deletes all stored phone book name tags and route name tags for OnStar (if present).
To use the delete all name tags command:
1. Press and hold 
for two seconds.
The system
responds with “Ready” followed by a tone.
2. Say “Delete all name tags”. The system responds with “You are about to delete all name tags stored in your phone directory and your route destination directory. Are you sure you want to do this? Please say yes or no.” • Say “Yes” to delete all name tags.
• Say “No” to cancel the function and return to the main menu.
See also:
XM Radio Messages
If you have a Radio with CD or Radio with Six-Disc CD, you can receive these
radio display messages.
If you have a Radio with CD (MP3), you can receive these radio display
messages.
...
Cruise Control
The cruise control lets the vehicle maintain a speed of about 40 km/h (25 mph)
or more without keeping your foot on the accelerator. Cruise control does not work
at speeds below 40 km/h (25 mph).
...
DIC Operation and Displays
The DIC has different displays which can be accessed
by pressing the DIC buttons located on the instrument
panel, to the left of the instrument panel cluster. ...