Thanks Fastbrick.

So I think that brings us back to this right ?

2004 Vortec PCM Pinouts

The pinouts should mostly be the same .... but

1) How would i know if a wire position changed - like 36 was no longer fan it was transmission VSS.
2) How to know what is added/different

My only goal is to lay it all out and dewire the main harness bundle to streamline it and add it to a 3 wire setup like
https://www.bp-automotive.com/produc...i-24x-engines/

then I will remove VATS etc via HP Tuners.

Just for a cleaner install. Don't want to remove something that I will need.

 

Bump-idity

 

From a guy in another forum he said that you can use that pinout and its pretty basic.
Just remove the pins noted.
Leave the others in place.

2004 Vortec PCM Pinouts

 

Side note.

What do most people do with large draw accessories like the FANS/AC - seems like they run them as a seperate circuit with the main harness.
Controlled by PCM ?