From what I have been reading the un-builts will be put onto the allotments for dealers for 2021 and that that allotment number will count towards the 2021 allotments so if dealer A gets an allotment of 10, and they get 7 built, the 3 remaining get taken away from their 2021 allotment.
So then...
I think from what I have been told GM finds out that kind of thing you can kiss any chance of getting another one from them as they are not in the business of car flipping :-) How are things man?
Cheers,
Kevin