Your vehicle may have an automatic dimming rearview mirror with OnStar®. This feature enables the mirror to sense nighttime glare from vehicle headlamps from behind and automatically dim to reduce the glare to a safe level.

The automatic dimming feature turns on each time the vehicle is started. Press the OFF button once and the green indicator light located to the left of the button will go out indicating the feature is off. To turn the feature back on, press and release the AUTO button and the green indicator light will come on.

There are also three OnStar® buttons located at the bottom of the mirror face. See your dealer for information on the system and how to subscribe to OnStar®. See OnStar® System for more information about the services OnStar® provides.