Help! Front brakes not releasing fully.

[CarolinaOBS]

Ok, recently removed a lift off of my c2500 suburban with hydroboost brake system. only 150k miles. It was fine for a couple days but now the front brakes are dragging badly and they won't release. The pedal gets firmer and firmer as you drive and the truck gets warm. Ive ordered new calipers and front brake lines in case one seized or a line is collapsing, but both front brakes lock up equally as bad. The rear drums aren't dragging. But i don't know much about hydroboost, could it be the MC?

 

[IADC43]

Sounds like a kinked line

 

[C30454]

If your brake light switch got adjusted improperly or disturbed during this procedure, it could keep your brake pedal from fully returning and that could cause your problem. It is dragging, and then as everything heats up from the drag, it also expands and gets tighter.


Tom

 

[CarolinaOBS]

Sounds like a kinked line

Would that cause both sides to lock up? And are you referring to a hardline because I just put new rubber hoses on it and made sure they weren't kinked.

 

[Supercharged111]

I had a bad vacuum booster once that did this. I'd have to crack the bleeder loose to get the car to move.

 

[CarolinaOBS]

I had a bad vacuum booster once that did this. I'd have to crack the bleeder loose to get the car to move.

it has a hydroboost. i went and got a low miles junkyard one, maybe if will fix the issue.

 

[Mountianjustice]

I had a bad vacuum booster once that did this. I'd have to crack the bleeder loose to get the car to move.

Had a 3rd gen Camaro do this. Ended up being the metal collar on the rubber line had rusted between the collar and rubber line and you could pump the brakes up but they wouldn't release. I cut the collar off and the problem went away.