'04 Gmc Sierra Front Brakes Dragging

jabolletta · June 9, 2011

I have a 2004 GMC 1500 Sierra 5.3 Z71 crew cab 4x4. I've have bizarre front brake problem which started with the left front brake dragging. I checked the temp with a heat gun and it registered over 500 degrees while the right front was around 190 degrees. The calipers move freely so I changed out the left front brake line assuming the clamp had rust under it compressing the line. A day later the right front brake did the same exact thing, over heated. I assumed the line had also gone bad so I was going to pickup a new right front brake line the following week. The next day I drove it both front brake calipers began to drag, overheating 500 degrees plus. I decided to replace the right side brake line along with the master cylinder, flush the system and bleed all 4 brakes, which I did. Now the left front is doing it again, I'm at a loss. Could it be caused by the brake booster or the ABS brake control module? The ABS light is not on and there are no codes stored. Any help would be greatly appreciated.

jabolletta · June 22, 2011

Replaced the front calipers, fixed.

I have a 2004 GMC 1500 Sierra 5.3 Z71 crew cab 4x4. I've have bizarre front brake problem which started with the left front brake dragging. I checked the temp with a heat gun and it registered over 500 degrees while the right front was around 190 degrees. The calipers move freely so I changed out the left front brake line assuming the clamp had rust under it compressing the line. A day later the right front brake did the same exact thing, over heated. I assumed the line had also gone bad so I was going to pickup a new right front brake line the following week. The next day I drove it both front brake calipers began to drag, overheating 500 degrees plus. I decided to replace the right side brake line along with the master cylinder, flush the system and bleed all 4 brakes, which I did. Now the left front is doing it again, I'm at a loss. Could it be caused by the brake booster or the ABS brake control module? The ABS light is not on and there are no codes stored. Any help would be greatly appreciated.