Sorry if this has been answered, I've searched and although I have found helpful information, I haven't quite been able to answer all of my questions so far.

I'm looking to swap an LSJ from an 04 Ion Redline into a sand rail project, and I'm trying to locate some information on modifying the factory wiring harness from the donor car to use as a standalone in the sand rail. From what I've gathered, this should be possible without the BCM utilizing the P12 PCM, but I'm not 100% sure how to eliminate the BCM and retain all of the necessary components that connect to it (throttle pedal, ignition, etc.). Most of the wiring diagrams I have been able to find are for the NA motors, so they are a little different than the LSJ.

It also seems the topic is fairly old, so a lot of links and pictures in relevant posts are no longer working. Is there a good source for these diagrams, other than paying for the GMSi membership?

EDIT:
For clarification, what I'm mainly curious about is not so much the PCM and engine harness, but rather the connection between the BCM related components and PCM. I'm not sure if the accelerator pedal position sensor, OBD2 port, and anything else that may be required can be directly wired to the blue connector on the PCM, or if anything additional needs to be done to delete the BCM.

Thanks!

 

CBM makes the harness to go with a mefi computer. Bite the bullet. Mine has been perfect and it rips.
https://custombuiltmotors.com/index-2c.html

 

 

Their harness costs as much as I have in my entire sand rail lol. If mine were anywhere near as nice as yours, I'd consider it. I think I may have found what I need though.