Might be tempting, but they are very proud of these trucks right now....Just got mine back, an 18, 40k miles, after a week, and was all warranty work.
oil galley pug, head gasket, refilled coolant, changed oil, and filter.
It was leaking from the rear and running to the front of engine. Dealer offered me 44k for it on trade, I paid 49k for it 3 years ago. Tempting