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? Now to tackle the wiring harness of vehicle getting the transplant.

Why remove Red 54 Fuel Level Sensor Signal, or Blue 70 Oil Level Switch Signal?

They arent needed. Your float signal is wrong for the PCM and it won't understand it. One less confusing thing to mess with. Oil level should be checked by you personally, don't trust a dumb switch.

I agree with Greg, I didn't use them on my 02 harness.

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. :doofus: 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 traced the wires the old fashioned way, split the loom and followed them where they went or used an ohm meter to find both ends of a wire at its respective connector.

Broke a pin that goes into the connector.:argg::tantrum: What is the fix action for this? Do they sell pins to repair it?:grr:

Pin 13 of the Red connector, is the Cruise Control Engage Signal, why do I need to remove it?

You don't have to remove any of the wires. They are only suggestions. If you can figure out how to use the signal wire then use it. Be sure to post up what you did with it and what gains you got keeping it and hooking it up to something.

Well alright, I am trying to get an understanding of what needs to be removed. I thought I would need pin 13 to use my cruise control. I guess I will see.