My 03 pulls to the right, and it's very annoying. I figured I would start playing with toe adjustments, but then I did some rough testing... I measured the wheelbase on both sides.
Spec is (I think) 160. 5" wheelbase on these trucks. Well, I measured each side, wheel center to wheel center and the right side is approx 1/4" longer than the left. That would mean the rear axle is NOT completely square, and could be the contributing to the pull.
Granted I did this with a tape measure (and with help holding it), but I did it twice to be sure and got the same number each time.
What I need to do when I find time, is find an alignment shop that uses the laser-based wheel sensors and see if that setup calculates that sort of thing. Then maybe it'll be possible to properly align the rear axle so it's square.
Rob