Well, yesterday went OK after all.
I was a little neverous about the situation with my truck, being unsure of what Kayser would do about it. It all stemmed from a statement made by Jon, the salesman, to Maryanne. She had asked who was going to pay for the repairs. He replied he didn't know yet. As it turns out, we didn't have anything to worry about. It was all a question of who would be billed internally at Kayser: the dealership, or the service department.
I'll reserve final judgment until everything is over, but things have gone well so far. I have a loaner that's in pretty good shape. The dealership has been good so far. They acknowledged their mistake, and they are going to "make this right."