GMC 2003 Sierra - Manual (Page 145)

Outside West Coast-Type Mirrors Outside Power Mirrors
If your vehicfB is equipped wllh the west coaat-lvpe
minrcirB, they can be adjuslscT &
q yipu can have a clear
vieiAf ot objects behind you.
A. Outer Minor Frame
B* Mirror Head
C. Nut
The mirrors can be adjusted by turning the mirror
head (B) and moving (he outer mirror trame (A)
backward or torward. You can also loosen ihe nul (C)
on the top and bortom ot the outer minor frame to lilt the
rnirror head-
If your vehicle is equipped
with power OLt&ida mirrors,
the controls are located
on the driver’s door
armrest.
Move the selector switch located above tbs conirol pad
to the left or right lo choose the minor you want to
adjust, then press the dots located on the four-way
control pad to adjust the mirror.
The minors also Include a memory function which works
in conjunction wUh Ihe memory scats. See "Memory
Seats" ir the IndeK for more inrornnalion,
2-sa