Dude its the automotive world, it happens all the time. I have a 2008 Denali, in 2009 the Denali got a better transmission, bluetooth, cooled seats, and a standard heated steering wheel. No matter what year you get they are going to do something sweet the next year to piss you off. I would not be upset if I had a 2012 ZL1 on order unless the 2013 had a huge HP gain.
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