I'm looking for an electrical write up on LS swap into an OBS.

What wires are needed to run the gauge properly etc.
figured we are going to do a stand alone harness to run the engine and the trans.

 

What year are you looking to do the swap in?

 

95. Gmc
5.7l

 

I would have to dig into it more but I believe on the 96-up they can repin the harness to work with a 411 PCM and it will control the Gauges as well.

What if I get you the Wiring Diagrams for the 95???

 

Here you go step by step on making a harness standalone (don't worry you don't need a face book to access it):
https://www.facebook.com/media/set/?...5211824&type=3

I used the info from his website(Wiring Harness Information) to make my 01 harness a standalone to run in my 95. Here are all the diagrams I have for a 95 as well:
https://drive.google.com/open?id=0Bw...Hloa0p1RjE3UDA

Good luck, if you have any questions I can try to answer to the best of my knowledge. I haven't finished the swap yet, but the 5.3 runs and the new efans work as well.

 

Thanks for the help and info.

 

There is some information in here as well:

OBS to LSx conversion