So go figure, my dad's 3500 (18 or 19) with the obnoxiously large computer screen died. totally. I think it JUST went out of warranty. First the nav system locked up and wouldn't point the correct direction. then the screen would remain on even after the timer shuts off the dome lights. then the whole thing just wacked out. he had to pull the fuse, which the dealer showed was under the hood on the passenger side. stupidest place for a fuse..should have been in the interior fuse pannel. anyway, they have to replace the ENTIRE head unit AND the computer. i think they are trying to figure out how to make it warrantiable because thats just insane. So that makes me nervous of course. because it could easily be a $5,000 repair. they just returned from a 5 week trip on the road with their 31' trailer too. imagine if that failed on the trip. needless to say he is trading it in for a different vehicle.