Hi-new guy here with a question. I did a quick search and didn't find an answer, so if this has been talked about before sorry for duplicate post. I am putting a chev 4.3L v6 from 2001 S-10 truck into a 50 chevy 2 door. The engine, transmission, ecm and harness are all being transplanted in. I have been going through the harness to trim it down to necessary items. Anyways, the Body Control Module was missing, so I have been wiring around it. My question is, will my ECM be able to operate without a BCM in the system? I am sure this will cause check engine light, but am not sure if this is going to lock things up. I am planning on re-flashing the ECM but wanted to try and get the engine fired up first. Thanks in advance for the help.