I had brought the car in 5 times with the LOUD 'WAAAAAWaaaaWhaaaa' sound coming from the front end. I drove around with the technician in the parking lot with the windows down with the car in neutral 4 of the 5 times. They made me feel like a total idiot each time I went in because they said the can't hear anything.

On the fifth and final time they decided to just replace the driver side wheel hub as that was all they think was making the sound. Luckily that fixed HALF of the issue. I could still hear the sound on the PASSENGER side!!!! A month later I convinced them to replace the other wheel hub which eliminated the sound just enough so I could hear my brakes grinding due to 'dry' calipers.

Be careful what you wish for! One problem does lead to another, and another...

Car was making strange noises. I could only hear this when i was driving slowly in very quite conditions. I took to dealership and it turned out to be both rear hub assemblies. Each assembly is 360 dollars and was covered under my extended warranty, however I still paid 100 dollars for a 4 wheel alignment. My complaint is that 52000 miles seems like a very unreasonable time for a condition which would have cost most people about 1200 dollars to have installed etc. Email me if you have had this same problem, I'm going to write a letter to Gm and Pontiac.