GMC 2007 Sierra - Manual (Page 185)

Outside West Coast-Type Mirrors
If your vehicle is equipped with these mirrors, they
can be adjusted so you can have a clear view
of objects behind you.
A. Outer Mirror Frame
B. Mirror Head
C. Nut
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) on the top and bottom of the outer
mirror frame to tilt the mirror head.
Outside Power Mirrors
If your vehicle is
equipped with power
outside mirrors,
the controls are located
on the driver’s door
armrest.
Move the selector switch located above the control
pad to the left or right to choose the mirror you
want to adjust, then press the dots located on the
four-way control pad to adjust the mirror.
The mirrors can be manually folded inward to
prevent damage when going through an automatic
car wash. To fold, push the mirror toward the
vehicle. To return the mirror to its original position,
push outward. Be sure to return both mirrors to
their original unfolded position before driving.
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