So when my Trans was replaced my reverse lights stopped working.. Bulbs are good, fuses are good and everything seems to be plugged in.. What else can I check?

 

Being you had transmission work done I'd say it could be the PNP(neutral safety switch) on the side of it.

 

I was thinking that, but
Everything else works fine.. Starts in N and all.. Any way to check to see if
It's getting power there?

 

The first sign of a problem with the NSS on a Cherokee is the loss of back up lights. I've been dealing with that for a while now. Every once in a while it doesn't want to start in park. Anyway I'm guessing it's the same with the Blazer. I had the trans rebuilt in our '96 Blazer and the PNP was replaced. Looks like the one on my Cherokee. Here's what I have to do on my Cherokee.
Jeepin.com » Cleaning your AW4′s NSS

Here's a GM PNP. You may just have to adjust it a bit for the lights to work or it could need cleaning like mine:
http://www.chevyavalanchefanclub.com...?topic=95768.0