The diesel exhaust fuel system was changed, and return to me the truck reported wrong fuel was in design and was going to shut down. The car was returned to the dealer for fixing. This took nine months for them to fix the car. They could not fix it. I had to drive a run-down loaner in the meantime. I refused to pay for this because it took them 9 months to repair the car, and I had to drive a run-down car in the mean time.