Using the “Delete All Name Tags” Command
This command deletes all stored name tags in the Hands-Free Calling Directory and the OnStar Turn-by-Turn Destinations Directory, if equipped.
To delete all name tags:
1. Press and hold 
for two seconds.
2. Say “Delete all name tags.”
See also:
XM Categories
XM stations are organized in categories.
To customize which XM categories are used and displayed in the system, see “Adding
or Removing XM Categories” following. ...
Bluetooth®
The Bluetooth system allows users with a Bluetooth-enabled cell phone to make and receive hands-free calls using the vehicle audio system and controls.
The Bluetooth-enabled cell phone must be paired ...
Clearing the System
Unless information is deleted out of the in-vehicle Bluetooth system, it will be retained indefinitely.
This includes all saved name tags in the phone book and phone pairing information. For informat ...