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:
Speedometer
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Onstar.com
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Ultrasonic Parking Sensor Light
This light comes on to indicate that there is a malfunction in the system.
See your dealer for service.
See Ultrasonic Parking Assist and Driver Information Center (DIC) for more infor ...