You’ve seen one auto show, you’ve seen them all, right? Wrong. While the Chevrolet, Cadillac, Buick and GMC exhibits were largely the same as they were in Detroit, the vehicles that filled them weren’t. Absent from Chevy was the Mi-Ray Concept roadster that we saw in Detroit, but in its place was an array of SEMAfied Sonics and Cruzen. GMC, of course, featured the refreshed Acadia and Acadia Denali on rotating platforms. As for Cadillac, there was the Ciel Concept that never managed to make its way to the D. Buick was pretty much the same.