Passenger door latch noise annoying

[Beach Bomb]

My passenger door is making an annoying noise like it is not shut all the way. It is shut securely. It only makes this noise when I go over bumps, thus it is hard to pinpoint. I am beginning to think it is the latch. It is a 96 4X4. Can anyone help. Thanks, Andy

 

[HookMeUp]

Is it a quad cab? Fill out your signature so we know what you have. On mine I had the same problem, just had to adjust the lower latch on the rear door.