Muting a Call
During a call, all sounds from inside the vehicle can be muted so that the person on the other end of the call cannot hear them.
To mute a call, press 
and
then say “Mute Call.”
To cancel mute, press and
then say “Un-mute Call.”
See also:
Potential Issues
Some OnStar services are disabled
after five days. OnStar cannot
perform Remote Door Unlock or
Stolen Vehicle Assistance after the
vehicle has been off continuously
for five days. After five ...
Keyless Liftgate Opening
Press the touch pad on the liftgate handle to open the liftgate if the
keyless entry transmitter is within range. ...
Lamps On Reminder
For vehicles with the lamps on reminder light, it comes on when the lights
are in use. ...