At low speeds on all but the smoothest pavement my rear passenger door picks up some kind or resonance or vibration or something that is very noticeable from the cabin. I brought it to the dealer and the shop Forman confirmed that there was a noise and took the vehicle into the shop. They pulled the door skin off but couldn't find anything loose that would cause the noise. In the end they used spray foam to try to make it go away which worked for a few days but now the vibration is back