FT, cant remember which module that was put in that truck. A buddy of mine deals & installs that stuff. I do know, that you have to take the box open to change the settings. The one in my '07, you just flip a toggle switch. After reading your post, it dawned on me that you said "04.5". I have a 305hp in my 04 & I think that you have a 325hp in your 04.5. God, family,country.(ropin',huntin'& fishin' too)The diffrence between a roper & a pizza- a pizza will feed a family of five.