2008 GMC Envoy Owner's Manual - Page 113

{CAUTION: If your vehicle has four-wheel drive, it will be free to roll - even if the shift lever is in PARK (P) - if the transfer case is in NEUTRAL. So be sure the transfer case is in a drive gear - not in NEUTRAL. See Four-Wheel Drive on page 2-29. Follow the proper steps to be sure your vehicle will not move. See Shifting Into PARK (P) on page 2-34. If you are pulling a trailer, see Towing a Trailer on page 4-45. Manual Rearview Mirror with OnStar® When you are sitting in a comfortable driving position, adjust the mirror so you can 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 allows you to 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. There may also be three OnStar® buttons located at the bottom of the mirror face. See your dealer/retailer for more information on the system and how to subscribe to OnStar®. See OnStar® System on page 2-48 for more information on the services OnStar® provides. Mirrors Manual Rearview Mirror When you are sitting in a comfortable driving position, adjust the mirror so you can see clearly behind your vehicle. Grip the mirror in the center to move it up or down and side to side. The day/night adjustment allows you to 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. Automatic Dimming Rearview Mirror with OnStar® and Compass Your vehicle may have an automatic-dimming rearview mirror with a compass. There may be three additional buttons for the OnStar® system. See your dealer/retailer for more information on the system and how to subscribe to OnStar®. See OnStar® System on page 2-48 for more information about the services OnStar® provides. O (On/Off): This is the on/off button. 2-39