Inside Rearview Mirror with Automatic Day-Night and OnStar® Switch Operation

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The inside rearview mirror with automatic day-night and OnStar features has 4 switches that perform the following functions:

The on/off switch is used to enable/disable the automatic day-night feature of the inside rearview mirror. To enable the automatic day-night feature, turn the ignition ON and depress the on/off switch. A green indicator will illuminate on the inside rearview mirror when the automatic day-night feature is enabled. To disable the automatic day-night feature depress the on/off switch.
The three switches on the right side of the mirror are for OnStar® operation. For more information, refer to OnStar Description and Operation in Cellular Communication.