Oh okay. Unfortunately, that method won't work for me because the noise just comes up randomly whenever the hell it wants to. I can set the cruise at 75 mph and not hear it for miles and then suddenly it comes on and lasts for maybe a few seconds and then goes away. I could even drive on a particular road one day, going a certain speed and hear it clear as day and then later on, drive that exact same road, going the exact same speed and not hear it at all. At low speeds, it sounds like a rattling sound and then at highway speeds it's that buzzing noise. It's almost as if a piece of metal somewhere that I can't seem to locate has broken loose and every now and then, gets caught in between something and causes the noise. Anyway, I'm taking it into a shop on Monday so they can check to see if anything might be worn or loose that I'm not seeing.