Depends on what model and options you want, and your dealer's allocation.
For example - I ordered a Suburban High Country with the Duramax and High Country Deluxe package on 12/9. It is still sitting in 1100 today.
Diesels were on a 10% max production constraint through December (may have been extended - cannot find info on that). This week, GM put the Air Suspension and NHT Max Tow packages on constraint. Basically they are not building anything with those options at the moment and your order will sit.
On top of that, in the case of my individual dealer - they did not get any Suburbans allocated for the month of January. Even though I have a sold order at the top of their stack, GM would not give them a Suburban last month. Supposedly whatever the first Suburban allocation they get for February will get assigned to my build. Now that they constrained it, who the hell knows.