This problem has probably been addressed elsewhere on the forum but I failed to find a definite answer, although I did read several posts that may have been the answer to my question. My car makes a high pitched whistling noise when I pull out to pass someone on the highway. I can make minor adjustments on the accelerator and that will take care of it but I'm wondering what it could be and how I can fix it. It almost sounds like it has a slight "gurgling" noise to the whistle and the sounds seem to be coming from the rear/center and not from the front (engine). It's been doing it for about a month and I've never experienced this with any of my GSs. Any suggestions? Thanks!

start looking for a new exhaust. Mine does it.. I know a couple people who had this problem the changed the exhaust and that fixed the problem.

does the whistle go "WOOOOT!!", and is it just like "a 'lam clack"?

sorry, i couldnt resist. :P

i also agree that its exhaust related. i would check for leaks around the area you mentioned, could be a slightly-blown gasket or somthing.

i have the same problem but hopefully by the end of next week, it ll be fixed because i m getting my header and downpipe installed. i hope mine is coming from the oem flex pipe because mine is cracked. check you flex pipe. hope that helps. i will let u know how it goes by the end of next week.