They’re still getting them in, though - Toyota and Honda have their own zaibatsus that can actually make their own chips, so they’re still producing albeit at a reduced rate.
I think they’re fabless, so they’re using some other fab's production capacity. This is a hedge, and it drives up the cost a hair. But it will assure some vehicle production to meet demand. I’m sure GM has product to sell too. They didn’t cancel all chip orders. This is more of a synchronization issue really. I suspect they produced the DOA vehicles thinking more chips would eventually show up. At a deeper take, it might be more expensive to idle production now.