I was looking at several auctions for 2004 Service Manuals. I emailed several sellers asking if it covered the new 600. The usual answers were to give the engines that it covers, including the 5. 9 Cummins. Just for fun, I told several of them via email that I knew someone who had the 04. 5 manual, and one responded back that they worked for DC and that if I knew someone who had it to get a copy from them because they could not get one yet. Hmmmmmm.
I called Tech Authority and asked if the 2004 had been updated for the 2004. 5 model change. The lady had no clue - said to call back in a month or two.