An RV dealer is not a franchise like an Auto dealer is. They can choose to do warranty work or not, obviously it's in there best interest to do warranty work to keep satisfied customers, but, if your not a customer of theirs, they may choose not to do the work. You saved $8,000 that's a lot of warranty work you could have done by an independent even if you had to pay for it. I did the same thing and that is what I would do if needed.
2011 Toyota Tundra double cab