Thanks for your help. 
2002 LS1 Wiring Harness Modifications
2002 LS1 Wiring Harness Modifications So far I have removed from the Blue PCM connector 23, 25, 28, 32, 65, and 68. From the Red PCM connector 4, 7, 13, 36, 37, 44, 53, 54, and 64. What other wires are no longer needed? Why remove Red 54 Fuel Level Sensor Signal, or Blue 70 Oil Level Switch Signal? Now to tackle the wiring harness of vehicle getting the transplant. 
Wiring Harness Schematics Thanks for your help. Now where in the service manual is there a definition/explanation of what the circuit does, or where can I find the circuit number and explanation? I know some are easy to identify, but some are not. On page 6-1412 Pin 2, Wire Color LT GRN, Circuit No. 1867, Function 12 Volt Reference. 
I want to know this to figure out which wires you knew to remove, if that makes any sense. By the way I forgot to add, my vehicle is a 1990 1/2 ton 2 wheel drive RCSB. It had a 5.7 TBI, now going to an LS1/4L60e.
I want to know this to figure out which wires you knew to remove, if that makes any sense. By the way I forgot to add, my vehicle is a 1990 1/2 ton 2 wheel drive RCSB. It had a 5.7 TBI, now going to an LS1/4L60e. Last edited by Chevy-art; Jul 6, 2008 at 02:48 PM.
If you're talking about the extra wires in the engine harness, look here
https://ls1tech.com/forums/conversions-swaps/936409-99-02-schematics.html Those are all the schematics for a 99-02 f-body LS1.
https://ls1tech.com/forums/conversions-swaps/936409-99-02-schematics.html Those are all the schematics for a 99-02 f-body LS1.
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Are you planning on running cruise control with your car? I removed any of the wires that had anything to do with cruise control. The wires that went to the brake switch to turn it off etc. If you are planning on cruise, then I would just leave it in place.
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LS1MCSS, I got the pin thanks. 
Okay a couple of more questions. I plan on using the EVAP canister. Where does Red 45 go, or do I even need it? From there it goes to C230 C. Should I, or do I need to, get rid of Blue 23 Circuit # 720 Low Reference, it goes to C230 G? Thanks Art...
