I am new to forum and new to owning a Camaro. I recently purchased a used 2011 2LT V-6 Auto Convertible. So far, I am loving it but have come to notice that mine is different from the rest. I have a whip antenna coming out of the XM antenna on the trunk. I have not seen another one like it accept in pictures. I have been reading a little about this and it seems this was a pre-production antenna and that the production model AM/FM antenna is hidden in the spoiler. Does this mean my car is a pre-production model??? Can anyone shed any light on this? Is there a shorter replacement?