[Hmmm2]

Well, you could do what I did the first two separate times I began hearing it in mine. When they said they didn't know what it was .. I handed them the keys and told them I would not drive it .. I thought it could be a safety risk. They said they were 'pretty sure' it would be okay to drive. "Pretty sure' made me feel uneasy. So, I took a loaner. They fixed the noise for 2 weeks .. and then it went back again. I asked for the loaner again. That was MY beginning to all of this. They didn't like it sitting there since GM gets the bill for the loaner. Finally, it was during that down time at the dealer that the field rep had shown up.