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:
Fuel System Messages
ECO MODE ON
On some models, this message displays when the fuel economy mode has been turned
on by pressing the eco button near the shift lever. See Fuel Economy Mode on page
9‑31 for more ...
Exterior
There's hybrid badging on the cab's rear window, ahead of the side mirrors
and on the tailgate, but otherwise the hybrid version looks similar to the
gas-powered version. ...
Using this Manual
To quickly locate information about the vehicle, use the Index in the back of the manual. It is an alphabetical list of what is in the manual and the page number where it can be found. ...