Recently I took my g 2008 g to the dealer just because my warranty is running out and I wanted to make sure everything with the car was well performing. I've been checking out other threads people posted about muffler rattle noise and also front engine knock noise, both of which I had heard at times in my vehicle. I told dealer about problem, they checked and told me that would be replacing mufflers for the rattle and the knocking was due to an faulty TCM I think he told me. Point being now the car is sounding worst than before. I'm wondering why and going to be taking back to them next week. I'm hearing a squeal short of noise wen I accelerate frm a stop, any suggestions?