GMC 2001 Sierra 1500 Pickup Owner's Manual page 150

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.
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The use of hood mounted air deflectors and add
convex mirror attachments may adversely affect
mirror performance.
Camper-Type Outside Mirrors (If Equipped)
If your vehicle is equipped with camper
they can be adjusted so you can have a clear view of
objects behind you.
Pull out the mirror head to extend it for better visibility
when towing a trailer.
West Coast-Type Outside Mirrors
(If Equipped)
If your vehicle is equipped with the west coast
mirrors, they can be adjusted so you can have a clear
view of objects behind you.
-
on
The mirrors can be adjusted by turning the
mirror head (B) and moving the outer mirror frame (A)
backward or forward. You can also loosen the nut (C)
-
type mirrors,
on the top and bottom of the outer mirror frame to
tilt the mirror head.
-
type
A. Outer Mirror Frame
B. Mirror Head
C. Nut
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