[ErVikingo]

Many thanks for the feedback Eric+John!!!!

Weirdest thing is that it never happened until my wife drove my truck and hit the seat memory button (that is the only thing she did different than me). Tech's solution "don't let your wife drive the car...". Ja ja

But, after that, it has happened 3 times.

I cycled through again last night (put in 20a, started, shut down and installed new 10a). Started, ran and all systems perfect on my drive to work. I restarted when I got to the office with no drama.

BTW, the starter was checked for load, etc. Must trace grounds and will get under the dash.

FYI, according to GM (I spent about 2 hours on the telephone with them) it might be related to the "passlock" system (inmobilizer) but they had me do all sorts of tests and all tested ok.

Any other suggestions please send them my way.