This post was continued here, in "request for Isuzu receiver hitch pictures" which ironicly answered my question in this post, if the 3.5 engine and the 3.5 DI engine have the same tow bar mounting points.

http://www.4x4wire.com/forums/showflat.php?Cat=&Number=906590

In short, yes--with a little rubbing on the muffler that might exist in either engine configuration.

[color:"white"]? 04 Rodeo DI ?[/color] 75k mi, body damage on the 1st weekend I got it.