1999 Chevrolet Tahoe Owner's Manual - Page 117

yellowblue Electrochromic Inside Rearview Mirror with Compass and Temperature Display (If Equipped) Your vehicle may have electrochromic inside and outside rearview mirrors. When on, an electrochromic mirror automatically dims to the proper level to minimize glare from lights behind you after dark. Temperature Display The temperature can be displayed by pressing the TEMP side of the switch. Pressing the TEMP switch once briefly, will toggle the temperature reading on and off. To alternate the temperature reading between Fahrenheit and Celsius, press and hold the TEMP button for three seconds until the display blinks F_ and C_. Press and release the TEMP switch to toggle between the Fahrenheit and Celsius readings. After five seconds of inactivity, the display will return to a normal temperature reading. The mirror also includes a display in the upper right corner of the mirror face. This can be used as a compass or to indicate outside air temperature. 2-47