I have a 2006 C6 Coupe and my friend has a 2006 ZO6. We both garage our cars over the off season. The first time my friend backed his ZO6 out of the garage, unheated, this spring in his driveway with the windows up for a short time on a sunny day he came out and his windshield was cracked. Are the windshields on the ZO6 different than on the C6. Has anyone else experienced this happening? Thanks.