FIG. 1 is a front perspective view of a combined pickup truck utility box and leg supports therefor showing my new design it being understood that the broken lines are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is an enlarged front elevation view thereof, it being understood that the rear is a mirror image of that shown;

FIG. 3 is a greatly enlarged fragmentary perspective view of the top and front therefor;

FIG. 4 is an enlarged right side elevation view thereof, the left side being a mirror image of that shown;

FIG. 5 is a greatly enlarged perspective view of one of the leg supports thereof shown separately for clarity of illustration; and

FIG. 6 is a greatly enlarged top, front and left side perspective view thereof with the leg supports omitted for convenience of illustration.