Sorry, Jedi is right, when I ordered my ZL1, the NAV system was on constraint but the order# was still valid and I was able to keep tabs on the build. I had a order # with dealer allocation that was used against the order.
If you don't have an order# from your dealer where they have burned an allocation, you don't have an order in the system and you will be queued with all the other delayed orders until the dealer has an allocation they can burn.
You can walk into the dealer and order a vehicle via the workbench, the output of your order is a vehicle that goes into the system as a request, if the dealer doesn't have allocation to spend, you have an order in the dealers queue waiting for the dealer to get allocation for a vehicle.
You need to go to your dealer and get a pie e of paper showing your order#, similar to this:
If you don't have any documentation validating your order, you might want to consider another dealer.