I claim the ornamental design for a truck rack set, as shown and described.
FIG. 1 is an elevated rear perspective view illustrating the truck rack set, including a rear rack on the rear of the truck and a front rack on the roof of the truck;
FIG. 2 is a rear view of the rear rack of FIG. 1;
FIG. 3 is a front view of the rear rack of FIG. 1;
FIG. 4 is a top view of the rear rack of FIG. 1;
FIG. 5 is a left side view of the rear rack of FIG. 1; a right side view of the rear rack of FIG. 1 is the mirror image of FIG. 5;
FIG. 6 is a front view of the front rack of FIG. 1; a rear view of the front rack of FIG. 1 is identical to the front view of FIG. 6;
FIG. 7 is a top view of the front rack of FIG. 1; and,
FIG. 8 is a left side view of the front rack of FIG. 1; a right side view of the front rack of FIG. 1 is identical to the left side view of FIG. 8.
The broken line showing the truck in FIG. 1 is for illustrative purposes only and forms no part of the invention.