GM Service Manual Online
For 1990-2009 cars only

Your vehicle may have an automatic-dimming rearview mirror with a compass and temperature display and the OnStar® system.

When on, the mirror functions exactly like the automatic dimming rearview mirror. See Automatic Dimming Rearview Mirror with Compass and Temperature Display for more information.

The mirror also has an eight-point compass reading and temperature display in the upper right corner on the mirror face. There is also a three-button OnStar® system.

Automatic Dimming Feature

The automatic dimming mirror function is turned on and off by pressing the far left button, located on the lower part of the mirror face, for up to 3 seconds. The light will go out when the feature is turn off.

Temperature Display

Press the on/off button located on the far left of the mirror face changes the temperature display. Your can select degrees Fahrenheit (°F), degrees Celsius (°C), or turn the display off.

Compass Operation

There is a compass display in the window in the upper right corner of the mirror face. The compass displays a maximum of two characters. For example, NE is displayed for north-east. The compass may need to be calibrated. See Compass Calibration in Automatic Dimming Rearview Mirror with Compass and Temperature Display .

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