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:
Playing a CD or MP3 CD (Radio with CD and Touchscreen)
Press the TUNE/MENU knob to display the CD Menu.
Shuffle: Select to play the tracks randomly rather than in sequence. Select again
to stop shuffle.
A checkmark indicates shuffle is on. Track List: ...
Maintenance Replacement Parts
Replacement parts identified below by name, part number, or specification can
be obtained from your dealer.
...
Traction Control System (TCS)/StabiliTrak® Light
The StabiliTrak or Traction Control System (TCS) indicator/warning light comes
on briefly when the engine is started.
If the light does not come on, have the vehicle serviced by your dealer. If t ...