does anyone know if the rear bumper with a trailer hitch from an s10 pickup will fit on my 89 s10 blazer? I was going to buy a reese hitch but last night I saw that some s10 pickups have the bumper with a trailer hitch on it. Anyone tried to do this swap? If so please post a reply I would appreaciate it thanks.

I've seen those bumpers on SUV's but never P.U's

If it's the same generation it should work. Crawl under first with a tape measure first to compare.
You might have to drill a few holes

I even understand that the first gen and second gen frames are the same (This is according to Advanced adaptors information. However I can't imagine the body mounts being in the same place), so with that in mind they might even fit a first gen S-10