I see Inside Line has more CO testing video of the two trucks. Great to see, but I really call into question their launch dates. Mentioned late(Fall) 2013. Maybe someone else on here knows something different, but didn't we already get preliminary build dates? Also, why would there be so much attention(the recent articles on Diana Tremblay's tasks) on the change over and build out happening now for prep from 900's to K2's if launch was that far out? I'm calling BS on Fall. GM call ill afford to wait that long. Even if they drop at NAIAS the need is to build as soon as possible a quality competitor for Ram and F-series.