For the 2016 Camaro, the fleet order guide was released 7/1/15 and the prices weren't available until 8/21/15. First production vehicles off the assembly line 10/27/15, with first pre-ordered delivery made 11/7/15. Build & Price wasnt up until 11/9/15...
So that had 1.75 months from fleet order guide > pricing info, and then 2 more months to production start, 3.75 months from fleet order guide to production start. But for Colorado/Canyon fleet order is 3 months before the alleged production start, so who knows how the pricing release will fall into place. Not sure how the process has streamlined in the last 7 years.
https://www.camaro6.com/forums/showthread.php?t=414568
https://www.camaro6.com/forums/showthread.php?t=420633
https://www.camaro6.com/forums/showthread.php?t=429015
https://www.camaro6.com/forums/showthread.php?t=429118