Checked and adjusted bands. Both were out of spec. they appeared to be about another two turns further out. (107in/pounds, then backed off 2 turns). Found a workshop manual and it appears our transmission is a 5R55S. Cleaned MAF and MAP sensors with isopropyl . I did have the cross member out and transmission leaning down to access the band adjustment screws.
Put everything back together and took for a drive (short) O/drive light and now engine light came on too.
Leaning towards an electrical wiring fault maybe. Going to order an scan tool to read codes as mine is not showing any faults.