See also:

Setting the Time
The radio may have a button marked with an H or HR to represent hours and an M or MN to represent minutes. Press and hold the hour button until the correct hour appears on the display. AM or PM ...

OnStar®
If the vehicle has OnStar and you subscribe to the OnStar services, please refer to the OnStar Terms and Conditions for information on data collection and use. ...

RDS Messages
ALERT!: Alert warns of local or national emergencies. When an alert announcement comes on the current radio station, ALERT! displays. You will hear the announcement, even if the volume is low or a ...