I need to disconnect the connector to the PCM to check some wires, if I disconnect the connector and reconnect will that do anything to the computer, or do I need reprogram something when I reconnect it. is there some sort of procedure to do this? ---------- Post added at 09:55 PM ---------- Previous post was at 08:50 PM ---------- found the procedure in my haynes book, now just need the wiring diagram and pin out for the PCM. this is for a 2001 Silverado 1500 4.8L I'm trying to trace the wires on the ECT circuit. I think I have a break in the ground side of the ECT sensor, gray wire. my haynes book isnt very clear on this subject.