Outside Convex Mirror; Outside Heated Mirrors - GMC 2004 Yokon Denali Owner's Manual

Outside Convex Mirror

Your passenger's side mirror is convex. A convex
mirror's surface is curved so you can see more from the
driver's seat.
CAUTION:
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A convex mirror can make things (like other
vehicles) look farther away than they really are.
If you cut too sharply into the right lane, you
could hit a vehicle on your right. Check your
inside mirror or glance over your shoulder
before changing lanes.
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Outside Heated Mirrors

Your vehicle may have this feature.
If your vehicle has a rear window defogger, it will also
operate when you press this button. See "Rear Window
Defogger" under Dual Automatic Climate Control
System on page 3-21 for more information.
When you press this
button, a defogger warms
the heated driver's and
passenger's outside
rearview mirrors to help
clear them of ice,
snow and condensation.