Whenever I use the windshield washers on my '04 2500 Quad Cab, an unplaeasant odor permeates the cab. The odor seems to be that of a distilled petroleum product but is not diesel fumes - raw fuel or exhaust. Bought the truck in late Nov '03, has 4,800 miles on it. Everything else is great - ride, room, noise level, etc. Starts great in the Iowa cold too!!!