When are those new GM suvs going to be revealed?

I have seen several in heavy camouflage on the public roads. The earliest a 2021 can be sold is January 1, 2020 according to EPA rules.

There is no North American International Auto Show in January 2020 in Detroit.

So not sure if they will release at another show, or do a standalone like the Corvette.

So I do not know, but put some other facts that may play into timing.