Bobbi Lanthier

I've heard about a guy on here that is supposed to be the best for vette questions. Can anyone tell me where I can find him? I have a 1998 C5 and I can't get rid of codes P0601 and P1518. I am sure I will be needing a PCM if anyone has one for sell. The car started right up the first time. I turned it off went back a little later and tried to start and it would die. Then all it would do is turn over and showed those codes along with restricted power, low power mode, abs issues etc.