2003 Chevrolet Tahoe Owner's Manual - Page 133

3. Keep pressing the on/off button until the desired zone number appears in the display. Release the button. After approximately four seconds of inactivity, the new zone number will be locked in and the comp/temp display will return. 4. Calibrate the compass as described below. 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 in one of two ways: Drive the vehicle in circles at 5 mph (8 km/h) or less until the display reads a direction, or drive the vehicle on your everyday routine and after several turns the compass will become calibrated and will display a direction. Compass Calibration The compass may need calibration if one of the following occurs: 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. The compass does not display the correct heading and the compass zone variance is set correctly. Passenger Air Bag Indicator Your vehicle may be equipped with a passengerair bag indicator, on the mirror glass, just above the buttons. If your vehicle has this feature, the mirror will displaythe word ON, or an air bag symbol in Canada, when the passenger air bag is engaged. For more information, see Passenger Sensing System on page 1-76. 2-44