2013 GMC Acadia - Infotainment glitches

Interior /dash lights go out or dim to nothing intermittently sometimes during rainy periods, but not always .Sometimes the cd player starts to activate with nothing in it, never used it even. To charge my phone, sometimes display reads : device not supported , or it disconnects from blue tooth
Newest issue in addition : passenger seat airbag lights up with NOTHING in the seat .No one can figure this out .

Could be a failing body control module. It controls just about everything in your vehicle and weird stuff can happen when it starts to go bad.