I need a schematic on the Fuse Block it's a 68-way Blk.
I found a older thread on it but my wires aren't matching up to that one.
Oh I'm installing a 5.3 in a 99 Tahoe and it has the 32-way Fuse Block so I was trying to figure out the wires I needed from the 03 5.3 harness to make this thing run, Other then the pink and orange wires. I bought a complete 03 5.3 out of another Tahoe with a complete wiring harness and ecm but I'm leaving the old ecm in there for the start, speed sensor, A/C and things like that.

 

PM sent,no need to keep the old black box.

 

Never did find that Jeff at Lextech Bro.

 

Old thread but worth a shot, doing the same swap on a 96 vortec truck and looking for the info on retaining the factory harness and adding to it to use my 6.0 engine. Any luck finding the pin out?

 

http://lt1swap.com/96-99_vortec_harness.htm

 

I sent my whole factory harness to Lextech and he integrated the LS harness into the factory harness. I love it; looks stock. Totally a pain to get the complete vehicle harness off, but he did a good job on my 99.
http://www.ls1truck.com/forums/lsx-t...-lsx-swap.html