Already have someone looking for me, but if someone can get at the info I need easier, it would be much appreciated. (I'm just impatient, I do trust him) Anyways, the 2004 Astros are *6 lug*. I'm trying to find out the specs on the front and rear brake rotors. (diameter/thickness) The online parts places I checked didn't even list 2004 parts. Besides, in my past experience, the actual rotor specs weren't listed. A manufacturer name/part number of the rotor might work too, as I've been lucky enough to have aftermarket manufacturers write back with the specs I need on occasion. Can't imagine GM would use different front/rears on these trucks, but I can hope. Fronts LOOK to be about the same as the 12"x1.25" truck fronts, but not positive.