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:
USB-Supported File and Folder Structure
The radio supports:
• Up to 700 folders
• Up to eight folders in depth
• Up to 65,535 files.
• Folder and file names up to 64 bytes
• Files with an .mp3 or .wma file extension
• AAC ...
Store a Name Tag for Speed Dialing
1. Push . System responds:
“OnStar ready.” 2. Say “Store.” System responds:
“Please say the number you would like to store.” 3. Say the entire number without pausing. System responds:
...
Engine Oil Pressure Light
WARNING
Do not keep driving if the oil pressure is low. The engine can become so hot that it catches fire.
Someone could be burned. Check the oil as soon as possible and have the vehicle serviced.
...