3 days after we purchased this NEW Cadillac we had it in the dealership where we bought it from to fix this windnoise. The salesman who sold us the car said "all CTS have this problem and GM is working on a fix. I'll call you when we get the repair order." That was 5 months ago. Now GM says mine is the only car that does this and the GM regional rep (who is a total jerk - his name is Mike Fisher) says it's a "normal" characteristic of this car. Please contact me if you own a 07 CTS and experience this type of problem. We have filed a complaint with the BBB. We'll see what happens. It's been in the shop 5 times of this crap! Now? All of a sudden, they (GM AND THE DEALERSHIP) say it's not a defect and there's nothing more they can do. They can kiss my butt! I WILL NOT give up until they have either fixed, replaced or traded me out of this God-awful CTS. It's sad that I'm 43 years old and FINALLY bought a caddy. Now I'd rather rent a car than to drive it.! Please let me know if you have this trouble with your CTS!