See also:

Ending a Call
Turn the Menu knob to select Hang Up, then press SELECT. ...

Add-on Electrical Equipment
The OnStar system is integrated into the electrical architecture of the vehicle. Do not add any electrical equipment. See Add-On Electrical Equipment. Added electrical equipment may interfer ...

Power Door Locks
(Unlock): Press to unlock all doors. (Lock): Press to lock all doors. See “Power Door Locks” in Vehicle Personalization . ...