I do not envy you, that wiring looks tough, I took my time and double checked my tags and still I missed some like the pink ones. Didn't know I needed them until I saw a blog in the LS1 section. Some guy said hook up this and this to hear it run so I did. It was magic, I really had a problem (scared) to hook up the wrong wire and fry the PCM.
Do you have the GM manuals ? :bowdown: