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 Adjustment
Every time the brakes are applied, with or without the vehicle moving, the brakes
adjust for wear. ...
System Identification
If the vehicle has the tire sealant
and compressor kit shown above,
see the operating instructions that
follow.
If the vehicle has the tire sealant
and compressor kit shown above,
follo ...
Safety
Side-impact airbags and all-disc antilock brakes are optional.
Driving Impressions
Despite structural similarities to the wildly styled Pontiac Aztek, Buick’s
crossover model has a personality ...
