Has anyone else ran into this issue? I called Hummer concierge this morning to switch dealerships that my reservation is linked with and was told since the Hummer portal is down due to overwhelming demand, they can no longer make a new reservation and link it with my existing reservation to the new store. I was told I should make some phone calls and see if any dealers have existing allocations that a customer backed out on. I hope someone can shed some light on this. I can understand them stopping preorders but if they are so upset about dealers charging markups why can't existing reservation holders change the dealership.