Check Engine Light On

ENIGMA206 · October 2, 2005

I have an '05 Sierra Z71 extended cab with 5.3 HO. It has about 4900 miles on it so far. I have about 2000 miles on a "Jesse Tune" PCM. Up to this point, the "Jesse Tune" has been great, well worth the money. But, today when I went home for lunch, my "Check Engine" light was on. I tried disconnecting the battery to clear the code, but that didn't work.

Should I try unplugging the PCM to clear the code or just wait to talk with Jesse tomorrow? Part of the reason I am asking is because my truck is going back to the dealer tomorrow for an ongoing door problem being litigated by the BBB. I am concerned with them seeing the light and questioning the PCM change.

By the way, I have not been able to locate anyone locally that can do the crank relearn procedure for me. Could this be the cause of the code?

redvett · October 2, 2005

You must do the relearn process. Any good shop with up to date scanner can do it should take 2-3 minutes and $10-15. You cannot clear codes by unhooking battery on OBD2. I wouldnt take it to dealer for another problem until SES light is off.