Service All-Wheel Drive Light

This light should come on briefly when you turn on the ignition, as a check to show you it is working.
The service all-wheel drive light comes on to indicate that there may be a problem with the drive system and service is required. Malfunctions can be indicated by the system before any problem is apparent, which may prevent serious damage to the vehicle. This system is also designed to assist your GM dealer in correctly diagnosing a malfunction.
See also:
SERVICE BATTERY CHARGING SYSTEM
This message is displayed when
there is a fault in the battery
charging system. Take the vehicle to
your dealer for service. ...
Playing the Radio
PWR (Power): Press this knob to turn the system
on and off.
VOL
(Volume): Turn this knob
clockwise
or counterclockwise to increase or to decrease
the volume.
DISPL (Display): When the ig ...
Muting a Call
During a call, all sounds from inside
the vehicle can be muted so that the
person on the other end of the call
cannot hear them.
To mute a call, press , and
then say “Mute Call.”.
To can ...
