Your Responsibility
Increase the volume of the radio if the OnStar Advisor cannot be heard.
If the light next to the OnStar buttons is red, the system may not be functioning properly. Push 
and request a vehicle diagnostic check. If the light appears clear (no light appears), your OnStar subscription has expired and all services have been deactivated.
Push to confirm that the OnStar equipment is active.
See also:
Trunk
WARNING!
Exhaust gases can enter the
vehicle if it is driven with the
liftgate, trunk/hatch open, or with
any objects that pass through the
seal between the body and the
trunk/hatch or lift ...
Convex Mirrors
WARNING!
A convex mirror can make things,
like other vehicles, look farther
away than they really are. If you
cut too sharply into the right lane,
you could hit a vehicle on the
right. Chec ...
Radio(s)
Radio with CD (MP3)
: Press to turn the system on
and off. Turn to
increase or decrease the volume.
BAND: Press to choose between FM, AM, or XM™,
if equipped.
: Select radio stations.
...