2006 Buick Rainier Owner's Manual - Page 101

To adjust for compass variance do the following: 1. Find the current location and variance zone number on the following zone map. Automatic Dimming Rearview Mirror with OnStar® and Compass Your vehicle may have an automatic-dimming rearview mirror with a compass and 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 on page 2-41 for more information about the services OnStar® provides. Mirror Operation When turned on, this mirror automatically dims to the proper level to minimize glare from any headlamps behind you after dark. 2. Press and hold the on/off button until a zone number appears in the display. 3. Once a zone number appears in the display, press the on/off button quickly until the correct zone number appears in the display. If C appears in the compass window, the compass may need calibration. See "Compass Calibration" explained previously. O(On/Off): This is the on/off button for the automatic dimming feature and compass. Press the far left button, located below the mirror face, for up to three seconds to turn the feature on and off. A light on the mirror will be lit while the feature is turned on. 2-31