2008 GMC Envoy Owner's Manual - Page 121

Outside Power Mirrors Your vehicle may have this feature. The power mirror control is located on the driver's door. Turn the control knob left or right to select the desired mirror. Then move the control knob to the left or right or up or down to position the mirror so that you can see a little of the outside of the vehicle. After adjusting the position of the mirrors, turn the knob to the center off position so that the mirrors do not move. If the travel position in any direction of the mirror is reached, it will enter a ratcheting mode. This action is harmless. It is a warning that the mirror can go no further. To stop this action, back the mirror up by moving the knob in the opposite direction. The mirrors can be manually folded inward to prevent damage when going through an automatic car wash. To fold, push the mirror toward the vehicle. To return the mirror to its original position, push outward. Be sure to return both mirrors to their original unfolded position before driving. Outside Curb View Assist Mirror If the vehicle has this feature, the passenger's outside mirror will adjust to a preset tilt position while the vehicle is in REVERSE (R) gear. Curb view assist may be useful when you are parallel parking. The mirror will return to normal position when the vehicle is shifted out of REVERSE (R) gear. Automatic mirror movement in either direction will follow a short delay. You may be able to turn this feature on or off through the Driver Information Center (DIC). See DIC Vehicle Customization on page 3-58. 2-47