See also:

Warranty
OnStar equipment may be warranted as part of the new-vehicle limited warranty. The manufacturer of the vehicle furnishes detailed warranty information. ...

Ending a Call
Turn or press the MENU/SELECT knob and select Hang Up. ...

Replacing Safety Belt System Parts after a Crash
WARNING A crash can damage the safety belt system in the vehicle. A damaged safety belt system may not properly protect the person using it, resulting in serious injury or even death in a crash. T ...