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:
Window Messages
OPEN, THEN CLOSE DRIVER WINDOW
This message is displayed when the window needs to be reprogrammed. If the vehicle's
battery has been recharged or disconnected, you will need to reprogram each f ...
Speedometer and Odometer
The speedometer shows the vehicle speed in both miles
per hour (mph) and kilometers per hour (km/h). The
odometer shows how far the vehicle has been driven, in
either miles or kilometers.
This ...
Memory Features
On vehicles with the memory
feature, the “1” and “2” buttons on
the outboard side of the driver seat
are used to manually save and
recall the driver seat and outside
mirror positio ...
