Another head-scratcher to digest and toss about:

My air bag light. Sometimes, it does what it has to: turn on when
starting, then shut off. But, other (unpredictable) times it will
start flashing a code (3-2, methinks) and stay lit = no airbag service
on this flight, thank you! This happens at start-up, or, on other
occasions, half-way through a longish drive.

Other times, and seemingly unrelated to the airbag light incidents,
I'll start the truck and get this awfull buzzing from under the
steering wheel or dash. At first it sounded electrical, now I think of
it as either a buzzer or a steel spring of sorts. The weirdest thing:
during this buzzing, if I use the multi-function switch, the buzz
stops immediately (e.g.: turn signal on - buzz stops; turn it off,
buzz returns).
Perhaps my MF switch is toast and in turn affecting the AB light...