2008 GMC Envoy Owner's Manual - Page 120

To adjust for compass variance, do the following: 1. Find your current location and variance zone number on the following zone map. Passenger Airbag Indicator The mirror may be equipped with a passenger airbag indicator on the mirror glass, just above the buttons. If the vehicle has this feature the mirror will display the word ON, or an airbag symbol in Canada, when the passenger airbag is enabled. For more information see Passenger Sensing System on page 1-61. Cleaning the Mirror 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. Outside Manual Mirrors Adjust the outside rearview mirrors so you can see a little of the side of your vehicle, and the area beside your vehicle from a comfortable driving position. The mirrors can be folded in to enter narrow areas. Return the mirrors to the unfolded position before driving. 2. Press and hold the COMP button until a zone number appears in the display. 3. Press the COMP button on the bottom of the mirror until the new zone number appears in the display. After you stop pressing the button, the display will show a compass direction within a few seconds. 2-46