Need some Help With Rear Hub Hole Sizes
 

Hey guys, I am looking at replacing the brake discs and pads on my 2002 Silverado 2500HD and am finding I have a bit of a problem. I am planning on DIY so I have been researching disc and pad options. Several of the sites I have checked indicate the rear hub hole diameter could either be 4-5/8" or 4.82". I called the local Chevy dealer parts department where I usually get my work done and they were ZERO help. The guy didn't even seem to understand the question and kept saying he needed the disc number off the old disc to get me new ones and still he would not know what the dimesion I wanted would be. Is there any way to find out which size I have (short of taking the rear brakes apart)? I am amazed that this is an issue and that GM can't tell me what the deal is. THANKS!!