OnStar Services

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Finish Damage
Any stone chips, fractures or deep scratches in the finish should be repaired right away. Bare metal will corrode quickly and may develop into major repair expense. Minor chips and scratches can ...

Tachometer
The tachometer displays the engine speed in revolutions per minute (rpm). ...

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 ...