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:
Tire Designations
Tire Size
The following is an example of a typical passenger vehicle tire size.
(A) Passenger (P-Metric) Tire: The United States version of a metric tire sizing
system. The letter P as the first ...
Satellite Radio
XM is a satellite radio service that is based in the
48 contiguous United States and 10 Canadian
provinces. XM satellite radio has a wide variety of
programming and commercial-free music,
coas ...
Steering Wheel Controls
Some audio controls can be adjusted at the steering wheel.
(Push to Talk): For vehicles with
a Bluetooth, OnStar, or navigation system, press to interact with those systems.
See Bluetooth (Inf ...
