Well figured out the rattle/tingy noise, just read this thread
http://www.camaro5.com/forums/showthread.php?t=134218
This is the noise on the driver side spring. According to the dealer and some posts I've read there is recall or fixable solution. I was thinking of adding something in between the spring to get rid of the noise. These springs are part of the AFM (active fuel management). So when car does not need all 8 cylinders these springs engage and when they're not engaged you hear the tingy noise.
Does anybody have a better idea to stop the noise? Can they be removed or does it effect something? I'd rather not remove as my car is a 2011 pace car vert and want to keep it stock, I hardly drive it as it only has 2900km in 2 years, but that noise is annoying.