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:
When to Add Engine Oil
3.9L V6 Engine
4.6L V8 Engine
If the oil is below the cross-hatched area at the tip of the
dipstick, add at least one quart/liter of the recommended
oil. This section explains what kind of o ...
Rainsense™ II Wipers
If the vehicle has this feature, the moisture sensor is
mounted on the interior of the windshield beside
the rearview mirror and is used to automatically operate
the wipers. This system operates ...
Control Buttons
The buttons used to control the CD/DVD player are:
MEM/DVD/AUX: Press to choose
between the MEM, CD/DVD,
and AUX.
: Press to select tracks or
to fast forward or rewind within a
track.
INFO: ...
