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:
Brake Pedal Travel
See your dealer if the brake pedal
does not return to normal height,
or if there is a rapid increase in
pedal travel. This could be a sign
that brake service might be
required. ...
Portable Audio Devices
This vehicle may have an auxiliary input, located on the
audio faceplate. External devices such as iPod®, laptop
computers, MP3 players, CD changers, etc. can be
connected to the auxiliary port ...
Heated Seats
Your vehicle may have
heated front seats.
The buttons used to
control this feature are
located on the front
door armrests.
The engine must be
running for the heated
seat feature to work. ...
