Quote Originally Posted by goldbergv95 View Post
have you ever had your pcm reflashed with the last calibrations?
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