I have a 2006 Silverado 1500 2wd with rear drum brakes. I've put new rotors, pads, calipers with slid pins, caliper brackets, front reubber brake lines, rear new drums and shoes, new master cylinder and flushed the system with new fluid. It seems that once the brakes get warmed up the front brakes start to drag on the rotor. They've gotten anywhere from 300-400 degrees and you can smell them burning. But I don't need to do anything and once the brakes cool down they will work again until I start to drive for a few miles. When they start to stick I can feel there is resistance in the pedal and I barley have to push it to start slowing down. But again once it cools down the pedal can go about 1/3 of the way down and starts to brake and feels normal. Once hot it feels like I can barely push it an inch and it starts to brake and feels stiff. The last things I have left to change is the booster and the ABS module. Could there be air in the lines? But that would make the pedal go all the way down right? This has been an on going problem and nobody seems to know what it is. Anyone here could possible have a fix or solution? Before I push this truck into a lake...

 

if all 4 brakes are hot, the pedal is hard and has no free play when the brakes are dragging; you need a new master cylinder

 

As I already said it has a new master cylinder and only the front is overheating. Not the rear

 

Is it both front brakes or just one side?

 

yes both fronts only

 

Brakes fixed. The problem was there was brake fluid in the rear diaphragm of the booster keeping the master cylinder from coming back all the way. Keeping pressure in the front lines

 

Thanks for sharing, I'm having front brake heating issues also, just had new pads, rotors and calipers put on this morning and to me the brakes are still overheating, just short trip rotors are over 205 degrees, rear are 148...

 

Replace your master cylinder and booster as an assembly. That was the problem with mine. Leaking mastercylinder

 

the front and the back are dragging from those temps. does the brake pedal have any freeplay...its should have approx 1 " free play before applying the brakes...if its hard right away...the m/c is not allowing the fluid to flow back past the compensating and relief ports.

 

Yes I have several inches of free play before brakes are applied, actually think it has too much travel. Also noticed if I am stopped and continue to apply pressure (not heavy) on the brake pedal that it gradually eases down, so may be master cylinder leaking by.
I think I will look into replacing the master cylinder and booster as Claudio mentioned.