After trying to read from my PCM with no luck tech support has determined that their is an issue with the PCM itself. my question is can i just go to a junk yard, or ebay and pick one up from the same year, make, model, engine, trans, and calibration ID? some of the ones listed on ebay state "programmed to your VIN" dose this just mean they changed the VIN? also some state they are for vehicles with chipped keys should i be able to change this in the program? the vehicle is a 2004 dodge dakota 3.7, AT.