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:
Interior Mirror
The vehicle has an automatic dimming inside rearview
mirror. Automatic dimming reduces the glare of lights
from behind the vehicle. The dimming feature comes on
and the indicator light illuminat ...
Maintenance When Trailer Towing
The vehicle needs service more often when pulling a trailer.
See this manual's Maintenance Schedule or Index for more information. Things that
are especially important in trailer operation are ...
Delayed Door Lock
When on, this feature will delay the
locking of the doors until
five seconds after the last door is
closed. You will hear three chimes
to signal delayed locking is in use.
Pressing either the ...
