I expect you tried this, too. You may have a rocker switch in the cupboard above your drivers seat left shoulder. If so, that is likely the Aladdin "Reset". I don't know if that would do anything that disconnecting the battery wouldn't do, but it might be worth a try.
Jim & Angie, Boise, ID
2006 Monaco Dynasty Countess III
2017 GMC Acadia Denali