Popping behind passenger seat
I've been noticing a popping/squeaking sound from behind the passenger seat in my regular cab OBS. It seems to occur only when the truck is flexing the frame, such as turning up a steep driveway or something like that. I was wondering what might be causing something like that. I don't know if it might be a cab mount, or what else might lead to it. It cannot be replicated (well, at least by me), by opening the doors and rapidly lifting up on one side of the cab.