The ornamental design for a surface configuration of a rear bumper for a vehicle, as shown and described.
This application is related to co-pending Application Ser. No. 29/168,898, of the inventor, entitled "Surface Configuration of a Vehicle, Toy and/or Other Replicas."
FIG. 1 is a right perspective view of a surface configuration of a rear bumper for a vehicle according to my novel design;
FIG. 2 is a front view of the surface configuration of a rear bumper for a vehicle according to my novel design; and,
FIG. 3 is a left side view of the surface configuration of a rear bumper for a vehicle according to my novel design.
The broken lines included depict environment and are not part of the claimed design.