Voice Pass-Thru
Voice pass-thru allows access to the voice recognition commands on the cell phone. See your cell phone manufacturer's user guide to see if the cell phone supports this feature.
To access contacts stored in the cell phone:
1. Press and hold 
for two seconds.
2. Say “Bluetooth.” This command can be skipped.
3. Say “Voice.” The system responds “OK, accessing <phone name>.” The cell phone's normal prompt messages will go through their cycle according to the phone's operating instructions.
See also:
Customer Assistance Offices (U.S. and Canada)
GMC encourages customers to call the toll-free number for assistance.
However, if a customer wishes to write or e-mail GMC, the letter should be addressed to:
United States
GMC Customer Assistance ...
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 m ...
Engine Oil Additives/Engine Oil Flushes
Do not add anything to the oil. The recommended oils with the dexos specification
and displaying the dexos certification mark are all that is needed for good performance
and engine protection.
En ...