After multiple failures, and tests from other members we came to the conclusion that it was eflive program, anything over the han 8 cals from efilive would render the pcm useless, i had it re-flashed by GM to stock and then went to hptuners, thing works great now, and also since hptuners has the settings for the efans, i no longer have my cel come on for the fans, also my p0420 are gone