the harness seems relatively simple

after looking at schematics for the Jimmy and 5.3 harnesses that mostly it's a color coordinated match, I also noticed that GM likes to leave their circuit numbers the same which is a big help

So far I know that the wiring connectors that are "loose" on the 5.3 are C100, C152, and C2 from the underhood fuse block

from here im just matching the functions with my "loose" connectors in the engine bay from the Jimmy which are C101, C104, C2 from fuse block, and C4 from my original VCM

I have matched all the C100 and most of the C152 connectors from the 5.3 with my Jimmy harness

I'll post an AutoCad layout of my progress soon