Side mirror of a truck

FIG. 1 is a front, left perspective view of a side mirror of a truck showing our new design, the portions of the truck shown in broken lines are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is an enlarged front, left perspective view thereof, without the truck portions shown;

FIG. 3 is an enlarged left side view thereof;

FIG. 4 is an enlarged right side view thereof;

FIG. 5 is an enlarged top view thereof;

FIG. 6 is an enlarged front view thereof;

FIG. 7 is an enlarged rear view thereof; and,

FIG. 8 is an enlarged bottom view thereof.

The broken lines of the figures are included for the purposes of illustrating environmental structure and form no part of the claimed design.