If it is like my 99 you need to take the spindle nut off the axle 1 11/16 socket I believe and then 4 9/16 that hold the hub assembly in from the back and it should pull right off leaving the axle shaft sitting in the spindle.
Yes, being an 03 they should be the over the hub style and are the easier of the two to replace. Just yesterday i had the fight of my life to get 1 rotor off the 98.5 im working on, i spent from 10am-4pm to do one side and managed to strip the axle nut in the process.:CRY:
Well, after much beating, the cows still weren't home. I think I'll have to take it to my mechanic for further persuation.
I had a 96 - 1 ton (with more years and rust) and I don't remember it being all that difficult to take off. Go figure.
I just did this on my '03 last week. The axle nut does not need to come off to just do the rotor.
My rotor was solidly rusted to the hub (and the hub/bearing assembly was even more rusted to the steering knuckle).
I sprayed some rust penetrant in around the hub/rotor joint and in the holes the studs come through. Apply heat. Apply 3lb hammer. Repeat many times.
I would not plan on the rotor being usable after you get it off. If your schedule allows I'd apply Kroil or something like that every day or two for a week and let it work its way in before you start wrenching.
I used many small pieces of wood between the hammer and the rotor on my 07, took a bit of time to get them off (rust) but they came off with little damage. I think the key is to keep rotating it while hammering so that it doesn't get cockeyed on the spindle.
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