Fluttering Noise I have a 2007 Saturn ION, purchased brand new. About a year ago, I started hearing a noise coming from the rear of the car. It usually starts when I reach a speed of arounf 45 MPH (sometimes slower) and usually continues until I hit around 65 MPH. It starts as a rattling, and as I pick up speed, it gets louder and sounds more like a flag flapping in a high wind. I brought it to the dealership where it was purchased three times. The first time, the rear air vent was replaced and sealed. No help at all. The other times I was told they could not pinpoint the source of the sound. And someone there had the nerve to tell me that the noise is normal. I am about to get rid of this car, even though I still owe 2 1/2 years of payments and may have to eat the balance after the trade in value is figured in. But if I can get this fixed, I will probably keep the car another year or so. Any direction as to what the source of the sound may be would be greatly appraciated. Thank you.