Cyber370

Ah man I feel for you. The best advice I can give at this point, you may not like. I would definitely force the dealer to take it back for undeclared accident damage. I would not keep the car. There are plenty of '16 Z Base coupes out there. You do not need to settle for a damaged one. I don't know how much you paid for it but I'm willing to bet you didn't save much since the accident damage was not declared.
Where I live in Quebec, this stuff goes on all the time. Our consumber protection laws are almost non-existent when it comes to shady dealers selling cars with undisclosed accident damage. They are not required to take the car back, believe it or not. But in the US, I believe you guys have very good laws against this sort of thing. Use them. Drive your car back to the dealer you bought it from and ask for a complete refund including out-of-pocket expenses. If the dealer refuses, sue them. It's an open and shut case based on your description of the situation.
I would not, under any circumstances, keep an accident damaged '16 Z that I paid full price for. Even at a discounted price, I would not keep it. Good luck!