I have a 2006 SS. I am having trouble with a battery drain from time to time. It will do fine for a week or so and then I go out to start it and the battery is dead. It is a new battery. I can charge the battery overnight and all is well for a while. I have done a battery drain test and found nothing, but again this is intermentit. This morning while checking it I heard a quiet buzzing between the driver side door jam between the front and rear doors. Any Idea's?