Door locks and seat controls

My door lock button and remote seems to be stop working at times, and when they stop i also notice that the seat controls stop working also. When this happens and i try to use the controls I hear a humm/buzzing noise under the dash. I replaced the door lock relay, but there must be something else that is trying to go out. I can disconnect the battery to the car and reconnect and sometimes they all will start working again, or just wait a bit and they'll start working on there own.

94 Suburban 1500