Brake parts swap

Service information says the pads, rotors and calipers are the same on the 2003 and 2004 between the 2 and 4WD versions. The front flex lines are different though as is the ABS programming.

Thanks that's what I needed to know.

You're welcome. FYI a quick way to check things like this is to visit rockauto.com find the vehicle you are looking for and then go to the part type. Then look at the blue part numbers on the left side, click them and it will tell you the years that part fits and if you read the listing it will say if it's 2WD 4WD which side, front or rear and such. One thing though, you listed the 4.7 engine. If they both have that engine the parts will work, if one has the 4.7 and the other has a 5.7 or the 8.3 then it gets a bit murky because some parts will fit depending on the actual options on the truck while others don't fit.