1947-55 are the same on all 1/2 ton and 1 ton panel-body trucks. That one does not look right: wrong number-of and style-of hangers; wrong lip/edge on front and back; and, wrong slots for the bumper brackets. The original has a turned up lip/slot on the bumper side to allow a rubber dust-seal to be placed/glued/pinched into the slot
It is quite odd that no-one makes the correct rear valance/shield in metal. It would fit all 47-55 GMC and Chevrolet panel-body trucks.