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:
Once a Year
• Starter switch check. See Owner Checks and
Services.
• Parking brake and automatic transmission P (Park)
mechanism check. See Owner Checks and
Services.
• Automatic transmission shiftl ...
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 ...
All Vehicles
WARNING!
You can be injured and the
vehicle could be damaged if you
try to do service work on a vehicle
without knowing enough about it.
• Be sure you have sufficient
knowledge, experience ...
