3.5mm Jack
Connect a 3.5mm (1/8 in) cable to the auxiliary input jack to use a portable audio player.
Playback of an audio device that is connected to the 3.5mm jack can only be controlled using the controls on the device.
Adjusting the Volume
Turn the 
/VOL knob to adjust the
volume of the infotainment system after the volume level has been set on the portable
audio device.
See also:
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. Press
and request
a vehicle ...
Compact Spare Tire
WARNING:
Driving with more than one compact spare tire at a
time could result in loss of braking and handling.
This could lead to a crash and you or others could
be injured. Use only one compact ...
Exterior Lamps Off Reminder
A warning chime sounds if the driver
door is opened while the ignition is
off and the exterior lamps are on. ...