GMC 1998 Yukon - Outside Manual Adjust Mirrors

To adjust for compass variance:
1. Use the COMP button located at the bottom of
the mirror.
2. Press and hold the COMP button for three seconds
until a zone number appears in the display.
3. Find your current location and variance zone number
on the following zone map.
4. Press the COMP button on the bottom of the mirror
until the new zone number appears in the display.
After you stop pressing the button
in, the display will
show
a compass direction within a few seconds.
Outside Manual Adjust Mirrors
Adjust your outside mirrors so you can just see
the side of your vehicle and have a clear view of objects
behind
you. Some mirrors can be folded in, to enter
narrow doorways.
The use of hood-mounted air deflectors and convex
add-on mirror attachments may adversely affect
mirror performance.
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