I began hearing a rattling noise from my engine area recently. I made an appt with my local Radley Chevrolet dealer. It was noted by the technician that the front exhaust pipe bracket that connects the 2nd front exhaust pipe is broken and tapping against each other causing the noise concern. They listed for me to replace the front exhaust pipe that goes from under the oil pan to the catalytic converter. Upon researching this issue, this appears to be a known issue for my specific year and make and model. However, upon calling GM they have nothing listed under my specific VIN number. I believe this to be an issue that should be covered under a special coverage or recall given the amount of owners having this same issue.