Flying MXZ

I ordered a Sierra 3500 on December 18th. The dealer called today and said it was sent back by GM as GM can't get something in the preferred package. So I could keep my order and delete the preferred package, or he would change the order to a stock truck and resubmit my build. I told them to resubmit mine as if I'm ordering I want to get what I want, and I'm in no huge hurry for the new truck.