[cdb95z28]

This is how I understand it.

A dealer gets an allocation. The dealer or customer creates an order. If the order that is submitted for that allocation has a constraint, it won't go to sequence #2000 until GM decides that particular build falls into their criteria.

An example of a limited constraint: GM says they have enough PDRs for xx number to be built that week and the above order has PDR and PDR orders haven't maxed out (so far), they may accept the order and get it in the queue for production. How GM decides which dealer will ultimately get the car built is a mystery sometimes, haha.

Another way constraint works, for example, GM may say they have zero PDRs available for the week. So no orders containing PDR will go to sequence #2000 and zero will be built.

I think, yeah, sometimes if an order gets to sequence 2000, it may take a while to get to 3000/3100. I think delays at that point are rare.