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If there is a plan, it's not something that's publically known. Anyone with any inside knowledge of GM's new model plans would get fired for prematurely releasing them.
The only thing we know is that production of the 2017 Z06 production won't begin until September.
If you want to read lots of speculation, (not knowledge), you might enjoy this thread:
Dates, but nothing about whatever a Zcsr is. Nothing about what, if any, changes the new model might have. I assume that's what the OP was really asking.
Last edited by meyerweb; Feb 16, 2016 at 04:01 PM.