2006 GMC Yukon Owner's Manual - Page 138

Compass Calibration The compass may need calibration if one of the following occurs: Cleaning the Mirror When cleaning the mirror, use a paper towel or similar material dampened with glass cleaner. Do not spray glass cleaner directly on the mirror as that may cause the liquid cleaner to enter the mirror housing. • After approximately five seconds, the display does not show a compass heading, N for North, for example, there may be a strong magnetic field interfering with the compass. Such interference may be caused by a magnetic antenna mount, magnetic note pad holder, or a similar magnetic item. Automatic Dimming Rearview Mirror with Compass Your vehicle may have an automatic-dimming rearview mirror with a compass. • The compass does not display the correct heading and the compass zone variance is set correctly. In order to calibrate, CAL must be displayed in the mirror compass windows. If CAL is not displayed, push the on/off button for approximately 12 seconds or until CAL is displayed. The compass can be calibrated by driving the vehicle in circles at 5 mph (8 km/h) or less until the display reads a direction. Mirror Operation When turned on, this mirror automatically dims to the proper level to minimize glare from any headlamps behind you after dark. 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. Passenger Airbag Indicator The vehicle may be equipped with a passenger airbag indicator, on the mirror glass, just above the buttons. For more information, see Passenger Sensing System on page 1-82 and Passenger Airbag Status Indicator on page 3-38. Compass Operation Press the on/off button once to turn the compass on or off. 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. 2-42