2003 GMC Envoy Owner's Manual - Page 107

Outside Convex Mirror A convex mirror's surface is curved so you can see -.-e fror .er's seat. II- Outside Heated Mirrors Your vehicle may have this feature. When you operate the rear window defogger, a defogger also warms the heated driver's and passenger's outside rearview mirrors to help clear them of ice, snow and condensation. -I..:. I 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. 2-38