Anyone experiencing this on the ZL1 yet? I have a rattle or knocking noise coming from the supercharger lid area at idle and it has gotten bad enough I can hear it in the car now.
I took the car to one dealer and of course I received the "that's normal" statement. I have researched TSBs and I don't believe that it is the belt tensioner issue common on the CTS-V. Several ZL1 owners listened to it this past weekend and agreed that the noise is not normal at all. I listened to the fuel lines and the one at the rear of the drivers side valve cover has a lot of racket with a stethoscope. Wondering if it is the check valve issue in the fuel line that was an issue on the LT4 ZO6?
Just uploaded a video...