I have a complete uncut wiring harness from a gmc or chevy truck that had a 5.3 and 4l60e 2wd transmission. The harness is complete and uncut complete with PCM and a full set of truck coils with brackets.
It is my understanding this is the easiest harness to swap for lsx based swaps.
More info on building the conversion portion here:
I would like to get 250 for the whole thing. Thats harness, PCM and coils!