Your vehicle may have an automatic-dimming rearview mirror with the OnStar® system.

There are three additional buttons for the OnStar® system. See your dealer for more information on the system and how to subscribe to OnStar®. See OnStar® System for more information about the services OnStar® provides.

The automatic dimming mirror function is turned on automatically each time the ignition is started. To operate the automatic dimming mirror, do the following:

1. Make sure the indicator light, located to the left of the on/off button, is lit. If it's not, press and hold the on/off button until the light comes on, indicating that the mirror is in automatic dimming mode.
2. Turn off the automatic dimming mirror function by pressing and holding the on/off button until the indicator light turns off.