FIG. 1 is a FRONT AND LEFT SIDE PERSPECTIVE view of a sunshade of a truck vehicle showing our new design; FIG. 2 is a LEFT SIDE ELEVATION view thereof; FIG. 3 is a RIGHT SIDE ELEVATION view thereof; FIG. 4 is a BOTTOM PLAN view thereof; FIG. 5 is a TOP PLAN view thereof; FIG. 6 is a FRONT ELEVATION view thereof; and, FIG. 7 is a REAR ELEVATION view thereof.