Hi Ralmo94, you are right, it is a wiring issue. I took the purple starter wire coming coming through the firewall and connected with the purple starter wire from the fuse block. it was pinned to C2 block. I went to put the negative battery terminal on and it sparked. Now I am a bit lost as where the wiring issue could be coming from. There is only 3 wires coming out of the firewall that I need to use with the stock harness/fuseblock/PCM for the engine to run.

The purple starter wire from the firewall is hot all the time. I don't believe this to be correct. But I have not mucked with the ignition inside of the truck.
Or is this normal for a 93 GMC? Any ideas on what I am missing?


This is how it is currently wired from fire wall:
large Purple starter wire is pinned to C1 A3 in fuse block.
Large Pink wire ignition hot in run/start pinned to C1 A9 in fuse block
Large red - hot at all times pinned to A7 in fuse block.
small pink ignition hot in run/start -pinned in C1 C9