This rear bumper is from a relative's estate and since I do not specialize in car or truck parts please look over the pictures to confirm proper fitment.
I believe this chrome rear bumper with brackets is from a 2004 2500 Heavy Duty SLT model. It has a pair of very shallow dings and one larger one all on the left side as seen in the pictures. It's total width is about 75-1/8" at the outside upper edges.
I copied this from an identical listing:
This Part Will Fit These Makes And Models With These Options