Constant rattle inside rear of cab traveling over rough city roads. Cause was found to be loose fitting latch when rear seats are stowed in the upright position. A couple wraps of electrical tape over the horseshoe shaped bracket closes then gap enough so that when the rear seat is stored upright it does not rattle.

Eventually the tape will wear through and need to be reapplied. A permanent fix would include a rubber or plastic tube with a split that can be placed over the bracket like foam insulation over a water pipe.