I know that the XM antenna will be body colored, but I have not yet seen a pic with either that or the OnStar antenna attached. I would venture a guess to them both being on one antenna (this has been in the works, whether the Vette gets it is anyone's guess).

Does anyone have a photo with the antenna/s?

 

As I understand it the antennae will be molded into the Windshield top so it is not noticeable period.