The Powertrain Control Module. I am hooking up an air/fuel gage and this is the last wire I have to hook up. If I can't find it today I know I can call auto meter tomorrow but I would really like to get this wrapped up. I know the colors of the wires I am looking for but don't want to just find any wire that color and not know it at least goes to the PCM. I did a search but couldn't find the answer. I looked at the 2001 service manual on disk but it wasn't very specific. Does anyone know where the pcm is?