Chevrolet avalanche 2002 用户手册

If your vehicle is equipped with camper

-

type mirrors,

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.

The controls for this feature
are located on the driver’s
door armrest.

Move the upper selector switch to the left or right to
choose the mirror you want to adjust, then press the
arrows located on the lower control pad to adjust 
the mirror.