2009 GMC Envoy Owner's Manual - Page 115

Mirrors Manual Rearview Mirror Adjust the mirror to see clearly behind your vehicle. Hold the mirror in the center to move it up or down and side to side. The day/night adjustment lets you adjust the mirror to avoid glare from the lamps behind you. Move the lever to the right for nighttime use and to the left for daytime use. Vehicles with OnStar® have three control buttons located at the bottom of the mirror. See your dealer/retailer for more information on the system and how to subscribe to OnStar®. See OnStar® System on page 2-43 for more information on the services OnStar® provides. how to subscribe to OnStar®. See OnStar® System on page 2-43 for more information on the services OnStar® provides. O (On/Off): Press to turn the dimming feature on or off. TEMP (Temperature): Press to turn the temperature display on or off. Automatic Dimming Mirror Operation Automatic dimming reduces the glare of lights from behind the vehicle. The dimming feature comes on and the indicator light illuminates each time the vehicle is started. Temperature Display Press O or depending on the mirror, press TEMP to turn the temperature display on or off. To adjust between Fahrenheit and Celsius: 1. Press and hold O or depending on the mirror, press TEMP until either a flashing F or C appears. 2. Press O or TEMP again to change the display to the desired unit of measurement. After approximately four seconds of inactivity, the new unit locks in and the display returns. Automatic Dimming Rearview Mirror The vehicle may have an automatic-dimming rearview mirror with a compass and/or temperature display. See Compass on page 2-40 for more information about the compass display. See "Temperature Display" after in this section. Vehicles with OnStar® have three control buttons located at the bottom of the mirror. See your dealer/retailer for more information on the system and 2-39