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:
Instrument Panel Illumination Control
Instrument Panel Illumination Control
The brightness of the instrument
panel lighting and steering wheel
controls can be adjusted.
(Instrument Panel
Illumination): Move and hold the
thumb ...
2012 Buick Regal Review by Warren Brown
It was a good car, but something less than the “high-performance variant” of
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Recommended Fuel
Use regular unleaded gasoline with
a posted octane rating of 87 or
higher. If the octane rating is less
than 87, an audible knocking noise,
commonly referred to as spark
knock, might be hear ...