Mmmleee

A few weeks ago, I took my car to the dealership because my car was making a static sound. It was coming from the Command console area. Even when I turned Command off, the sound would persisit. I turn the AC off, and the sound would still be there. Turn the engine off, and the sound would die down after a few seconds.
The dealership replaced my rear speakers. It solved the problem for awhile. Now I have the same issue again.
Am going to schedule an appointment with another dealership, but wondering if anyone else has this issue?