2006 GMC Envoy Owner's Manual - Page 128

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 3-60. Outside Convex Mirror {CAUTION: A convex mirror can make things (like other vehicles) look farther away than they really are. If you cut too sharply into the right or left lane, you could hit a vehicle. Check your inside mirror or glance over your shoulder before changing lanes. The passenger's outside mirror is convex. A convex mirror's surface is curved so more can be seen from the driver's seat. Outside Heated Mirrors Your vehicle may have this feature. When you operate the rear window defogger, the defogger also warms the heated driver's and passenger's outside rearview mirrors to help clear them of ice, snow and condensation. 2-48