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:
Reporting Safety Defects to theUnited States Government
If you believe that your vehicle has a defect which
could cause a crash or could cause injury or
death, you should immediately inform the National
Highway Traffic Safety Administration (NHTSA),
in ...
Cleaning the Display
Notice:
Using abrasive cleaners
when cleaning glass surfaces
could scratch the glass. Use only
a soft cloth and do not spray
cleaner directly on the system as
it could affect the mechanical ...
Exit Lighting
With exit lighting, the interior lamps come on when
you remove the key from the ignition. If the
dome override is off, these lamps stay on for a
short period of time and then go out. ...