1999 Chevrolet Tahoe Owner's Manual - Page 118
1999 Chevrolet Tahoe Manual
Page 118 highlights
yellowblue Press and release the TEMP switch to toggle the temperature display between Fahrenheit or Celsius. If an abnormal reading is displayed, please consult your dealer. Electrochromic Mirror Operation The right side of the switch, labeled TEMP, located at the bottom of the mirror turns the electrochromic inside and outside mirrors on and off. An indicator light, located to the right of the TEMP switch, will come on when the electrochromic mirrors are turned on. To turn the mirrors on, press and hold the TEMP button for six seconds. To turn the mirrors off, press and hold the TEMP button for six seconds. The indicator light will turn off. Compass Operation Press the COMP switch once briefly to turn the compass on or off. When the ignition and the compass feature are on, the compass will show two character boxes for approximately two seconds. After two seconds, the mirror will display the compass heading. 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. Compass Calibration If, after two 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. If the letter "C" should ever appear in the compass window, the mirror may need calibration. The mirror can be calibrated in one of two ways: D Drive the vehicle in circles at five mph (8 km/h) or less until the display reads a direction, or D Drive the vehicle on your everyday routine and after several turns the compass will become calibrated and will display a direction. 2-48