I finally got the info breakdown on my dually and wanted to know what the dates were that would determine if its just an '04 or an '04.5. The truck was built on 22 May, 2004. Any help would be greatly appreciated. Thanks

 

Most trucks built after 1/1/2004 are the '04.5 model. The one way to know for sure is to look at the data plate on the top of the engine. If it says 300hp and 555tq it is an '04, 325hp 600tq is the '04.5.

 

01-04 is the start of the 04.5 trucks with the 325 engines.

 

thank yall so much