Ok, I did the search thing and I'm not getting the answers I'm looking for. My 2008 LT Sedan is getting a "groan" which sounds like it's coming from the passenger side front wheel. It seems like when I turn right, the noise dissipates. I tried calling 3 GM dealers and all of them told me the service and repair shops are only open Monday through Friday. So I am a little irritated that these wheel bearings would start announcing their failure at around 57,000 miles. I would expect this to be covered under GM's 100,000 mile powertrain warranty. Is it not?