For 1990-2009 cars only
The vehicle may have an automatic dimming inside rearview mirror with OnStar® controls. For more information about OnStar®, see OnStar® System .
(On/Off): The on/off button, located on the lower left side of the mirror, is used for the automatic dimming functions of the rearview mirror.Mirror Operation
The automatic dimming feature comes on each time the vehicle is started. Automatic dimming reduces the glare of lights from behind the vehicle.
To turn the automatic dimming feature on or off, press and release the AUTO/ (off) button. The indicator light will come on when this feature is on .
