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:
Purposeful design
From every angle, the All Terrain HD looks the part of a dedicated off-road
performer, with bold, accentuated features complemented by a wide stance and
tall profile.
Streamlined bumpers are des ...
Features
The Denali comes with a long list of standard equipment to please passengers:
Heated leather front seats, a Bose stereo with a six-disc CD changer, XM
Satellite Radio and a three-zone air-conditio ...
Turning the RVC System On or Off
To turn off the RVC system, press and hold ,
located on the inside rearview mirror, until the left indicator light turns off. The RVC display is now disabled.
To turn the RVC system on, press and h ...