Order sheets will not be out soon, unless one counts the earlier leaked specs and one is going to pre-configure theirs based on it — which BTW I throughly enjoyed doing for mine. Real GM order sheets however, will not be out until after 7.18.19 (96 days away). If a dealer wishes to start their internal list of their customers who want a C8 (choosing to require a deposit or not), that is so old news, for Mike Furman @ Criswell took my check on Feb. 1, 2015 (not a typo), and has more than 200 deal folders (almost all without a deposit until the customer chose to send him a check, and who has in writing stated that every deposit he receives, even after he has placed a customers’ actual order (again paired with a GM allocation), would still be refundable.
The first consensus in which GM has granted a dealer an allocation, and for which GM would to accept an order based on that allocation will be no sooner than mid August, and my belief that even that is a very optimistic timeline, that September is more realistic.
We got a nice taste of the future C8 48 hours ago, but it is a L O N G until we get meaningful further GM issued information (exception the official release of the potential minor things as the release of the C8’s emblem and similar which we could see long before the reveal.