I have the same sound and I am in desperate need of any advice on my noise issue. I have a 2006 Pontiac Grand Prix GXP. I love this car but it has a TERRIBLE whining noise that no one in Memphis can seem to diagnose. When I push on the gas and the rpm's increase, there is a loud whining noise that will increase in pitch and loudness as the rpm;s increase. When I take my foot off the gas, the noise disappears and it also does not happen when in neutral? I just had the transmission rebuilt at a local Aamco (not for this reason)and the alternator replaced and they say it is not transmission related. Someone please give me ideas that I can take to my mechanic. He is at a loss as is the dealership. The noise seems to be coming from the drivers side but I am not for sure?
My email is
gaylordk@comcast.net Thanks, this is my first time posting.