2003 GMC Envoy Owner's Manual - Page 104

Mirrors Automatic Dimming Rearview Mirror with OnStarB and Compass Mirror Operation When turned on, this mirror automatically dims to the proper level to minimize glare from any headlamps behind you after dark. The automatic dimming feature is turned on and off by pressing the far left button, located on the lower part of the mirror face, for up to three seconds. A light on the mirror will be lit while the feature is turned on. Compass Operation Press the on/off button once to turn the compass on or off. Your vehicle may have an automatic-dimming rearview mirror with a compass and the Onstar@ system. button for the automatic dimming feature and compass. There are three additional buttons for the Onstar@ system. See your dealer for more information on the system and how to subscribe to [email protected] OnStaP System on page 2-40 for more information about the services Onstar@ provides. 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. ? (On/Off): This is the on/off J Compass Calibration Press and hold the on/off button down for nine seconds to activate the compass calibration mode. T A L " will be displayed in the compass window on the mirror. The mirror can be calibrated in one of two ways: Drive the vehicle in circles at 5 mph (8 km/h) or less until the display shows "CAL", or 0 drive the vehicle on your everyday routine. (This method may take longer to calibrate.) 2-35