I'm not sure anyone comes around here anymore. Accept for the spamming of course.

I can't help you with your question because your swap is using a newer PCM (Green/Blue Plugs) than I did, but did you contact BP harness?

I have had pretty good luck finding answers to things over at http://67-72chevytrucks.com/vboard/index.php They have a section for our trucks and no spam.

You can also try https://www.gmt400.com/ That whoile site is about OBS trucks and they have an LS Swap section too.