1. It sounds like bad rotors, or a problem in the master cylinder causing the brakes to hang, or he just rides them

2. There is a huge difference between light duty and heavy duty brakes. For one the thickness of the rotors, a 1500(light duty) has thin rotors, the HD's have Huge rotors front and rear along with better calipers to put some claming force on those big rotors.

 

Actually I just looked up calipers and rotors for both a 2003 Chevy Silverado 1500 4x4 and a 2003 Chevy Silverado 2500 4x4 HD and it pulled up the same part numbers.

 

What kind of pads are they?

 

I didn't look up pads. Just rotors and calipers.

The factory pads are all AC Delcos

 

Are they metalic or semi-metalic?

 

Not sure on that one.

 

well you need to look again, chevys use hat rotors, a 1500 has 6 lugs the HD's have 8 lugs there is no way the same rotor will fit from one to the other, were every you looked is wrong, they cant be the same part number cause there different parts. How can you fit a rotor with 6 lug holes onto a hub that has 8 lugs?

*edit* unless you looked up a 03 1500HD Crew, that has the same brake pakage as the 2500HD's, the standard 1500 uses a different setup.

 

factory pads are ceramic type,last 100k +.....rear wear out around 60-80k....try this...pump the pedal several times,(engine off),crack a bleeder valve and see if it "spits" fluid...if it does,m/c seal is sticking and keeping pressure applied,(hope you dont have something other than brake fluid in there ?)...if it does'nt spit fluid out,possible booster issue....it it hydro-boosted or vacuum ?

 

Thanx for the Post.