Well, cleaned the terminals and connectors really well and the PCM reset, of course...Seem to run just fine this morning, weird, and no codes again.
Just really weird it disabled the ESP and a 'flashing' CEL. I am really starting to suspect the battery and only wish I knew 100%, it wouldn't be so bad. Last thing I want to do is throw money at 'maybe this', 'maybe that' scenarios.
As much as I hate to say this, I may look into getting something else
I just don't have time to mess around with mystery gremlins and about had enough hearing the wife say 'told you so' and why'd ya sell the GTO, etc. Shame, cause I really like this thing...Just don't want to always be in doubt if it's gonna start, how's it gonna run, blah blah.