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2008 GMC Sierra 1500 Brakes


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2008 GMC Sierra 1500 4WD

 

Something is causing front brakes to heat up. Replaced calipers, hoses, pads and rotors. Very strange. Has anyone ever seen a master or ABS hydraulic unit cause brakes to drag? Thats the only thing I can think of is that they are slightly dragging.

Edited by G Armando
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Start LLC for $0 at IncFile


Start LLC for $0 at IncFile


Start LLC for $0 at IncFile

2008 GMC Sierra 1500 4WD

 

Something is causing front brakes to heat up. Replaced calipers, hoses, pads and rotors. Very strange. Has anyone ever seen a master or ABS hydraulic unit cause brakes to drag? Thats the only thing I can think of is that they are slightly dragging.

 

do you have a driver that rests their foot on the brake pedal while driving?

are rear brakes working?

did this problem exist before changing all those parts?

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lift the truck up - try to spin front tires - if all is ok pump brakes a few times and respin tires - do this with engine off and also running - if they dont feel like they're dragging at all under either condition i would start working my way farther up the system - i know for a fact these trucks have problems with the braking system - but mostly the complaints are warped rotors and worn pads - you may have a severe case of whatever this problem is - possibly may not even be a brake problem - maybe check front axles and hub bearings- oversize wheels and tires? and - did your parts supplier in fact give you the right parts? if all checks out good let me know.

it may sound strange - but pull the master cyl off the brake booster - measure the rod depth - then measure it again with the vehicle running - 170k maybe weak diaphragm? check front suspension also - are the shocks blown? may not be dragging but simply being over worked.

let me know how it turns out

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I did find a rear adjuster that seemed frozen and rear brakes out of adjustment. They were adjusted last time according to my tech. Also what was driving me crazy was a pulsation. The pulsation ended up being rear drums needed cutting. The reason that I didnt think the pulsation was coming from the rear was because during a road test I had applied the E brake by itself and there was no pulsation. When I got the rear brakes adjusted tighter, the pulsation got worse so i cut the drums and everythings smooth now. Hopefully I wont see this again for a while. Thanks to all for your replies!

Edited by G Armando
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