Finally got time to solve the misfire.
I tried 3 different scanners, none showed mode 6 misfire counts. A friend loaned me some known good coils, swapped each one, no change. Finally bought new ngk platinum plugs and AC Delco wires, and the misfire is gone, she runs like a goat. I am happy. It was something on the passenger side, I was in a hurry from a thunderstorm and couldn’t determine which cylinder exactly.
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No need to use Mode 06/Generic OBD on GM vehicles, They have a fantastic misfire monitor through manufacturer scan data,