WHEN APPLY BRAKES THEYGRABE - 2000 Chevrolet Silverado 1500

There is a problem on a gallipper guides must be stuck dosent work properly take it a part and grease your guides

Brakes apply by themself - CarGurus

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CarGurusNov 10, 2008 - Brakes apply by themself - I have a 1999 F-350 Super duty 7.3 diesel ...The brakes, (I think the rear ones only ) apply by themself, usualy when I first ... I have a simular problem only in the front brakes of my 2000 duelly with 4WD. ... At this point one of the wheels (I can't tell which one) begins to hop wildly to ...

Front brakes begin to lock up while driving - ChevyTalk - FREE ...

www.chevytalk.org/fusionbb/showtopic.php?tid/242473/

May 22, 2010 - When you have the brakes apply and eventually lock up bythemselves, the problem is that the valve to the resovoir of the brake fluid isn't opening. ... When this problem accurs you can feel that you have less play in the pedal, ...

AstroSafari.com • '93 Front Brakes Applying Themselves

Do you have a vacuum brake booster or on of the hydrovac brake assist units.

check calliper assembly sliding pins they may need lubing with a bit of grease, check for anti rattle shims if there aply a tni film of sylicone on it face and reinstall

Check your front and rear caliper slides for sticking,it sounds like one may be stuck.

Might be bad brake lines if front (the rubber ones). When they get old they collapse when you apply the brakes and they won't let the brake fluid go back to the master cylinder until the pop back open.

It's the brake booster leaking. I would suggest taking it to a shop, very slowly.

It may be that your power assist booster behind the brake master is leaking and when you apply the brakes it robs all your vacuum. Try plugging the hose that goes to the power assist boost and apply the brakes. If the engine stayhs steady thats your problem!

1- brake system low on fluid,
2- improperly bled (air in lines).
3- Master cylinder (applies equal pressure to all 4 cylinders) is bad.

your master cylinder is gone. when stopped apply pedal and hold let up slightly then reapply if pedal sinks to floor master is bad.