tgbol,
The early trucks (like my 96) and his 95 have a chrome piece, black top piece of plastic, a gray plastic portion of the bumper and then (if an SLT) a lower black lip and inserts to the radiator opening.
The Sport bumper is molded one piece (I believe) and has a recess in the top for the slightly different (taller) grill. The Sport also came with clear headlights and turn signals.
Painting the stock bumper and been done, but will usually start to peel from the palstic pieces as they flex in the cold and heat.
I have thought about doing the Sport upgrade at some point to "make me feel" like I bought a new truck rather than spending 30K plus. Just have to wait for the right opportunity.