See also:

Muting a Call
To Mute a Call Turn the Menu knob to select Mute Call, then press SELECT. To Cancel Mute Turn the Menu knob to select Mute Call, then press SELECT. ...

Using Cruise Control on Hills
How well the cruise control will work on hills depends upon the vehicle speed, load and the steepness of the hills. When going up steep hills, you might have to step on the accelerator pedal to ...

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