you may have placed your order based on the constraint list at the time of your order, but if there were 11 Denali XLs in front of you and they only were allocated 1, then you're out of luck for that round. Honestly would be surprised if it was actually 11 XLs in front of you which wouldn't make sense as the allocation is based on model/trim/constrained options (unless it's a large volume dealer).
not to burst your bubble, but when your time comes up and they have an allocation for a Denali XL and you have a "now constrained option" you may get passed over, or at least hopefully the dealer asks you about modifying your order
the basics are -
you place an order, if the dealer doesn't have an allocation for the trim level you are ordering, the order is placed, but not officially accepted. This is the aspect of GM's ordering that doesn't make sense, all it does is create confusion...you shouldn't be able to place an order if it can't be placed in the queue immediately - even if it means a 2-3 month wait
The order won't be accepted until the dealer has an allocation and none of your options are being constrained...an order can still be accepted when some options are on constraint if the dealer get an allocation for that constraint
so the dealer may have to get an allocation for both the trim level and any option that may be constrained - example would be if they got an allocation for a Denali XL but didn't get an allocation for the sunroof and the pano was part of your order, then GM wouldn't accept it even if the roof wasnt constrained when you initially ordered.
We ordered a Yukon AT4 with the rear media back at the first of Dec and it still hasn't been accepted (we already gave up on it and shifted to a Z71 without the rear media)