2005 GMC Envoy Owner's Manual - Page 116

Manual Rearview Mirror with Compass and Temperature The vehicle may have a manual rearview mirror with an eight-point compass and temperature display located in the upper right. 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. When the ignition and the compass/temperature feature are on, character boxes will appear for about two seconds. After two seconds, the mirror will display the direction the vehicle is facing and the outside temperature. To set the temperature in Fahrenheit or Celsius, do the following: 1. Press and hold the on/off button until either a flashing F or C appears. 2. Press the button again to change the display to the desired unit of measurement. After about four seconds of inactivity, the new unit will be locked in and the compass/temperature display will return. Mirror Operation While sitting in a comfortable position, adjust the rearview mirror so you can see clearly behind your vehicle. Grip it in the center and move it up or down and side to side. The day/night control, located at the bottom of the mirror, adjusts the mirror to reduce headlamp glare from behind during evening or dark conditions. Push the control for daytime use; pull it for night use. Compass Calibration When on, the compass automatically calibrates as the vehicle is driven. If, after two seconds, the display does not show a compass direction, (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 compass may need calibration. Press and hold the on/off button for nine seconds to activate the compass calibration mode. CAL will be displayed in the compass window on the mirror. Temperature and Compass Display O(On/Off): Press this button to turn the compass and temperature display on or off. The compass display, can show a maximum of two characters. For example, NE is displayed for north-east. 2-42