Question about 1991 GMC S-15 Jimmy

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Front brake drag

I have a 1991 gmc jimmy s15, 2 wheel drive, both front brakes drags, i replaced wheel bearings,rotors,pads,master cylinder,both calipers,both front brake hoses,output rod is adjusted correct. both brakes still drags, what else can cause this.

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Does it have abs breaks? I have heard of problems with the older abs systems.

Posted on Apr 13, 2009

  •  Richard
    Richard Sep 25, 2012

    How would one know if it has abs? Would it say it somewhere?

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I had same problem, the flexible tubing may be clogged or bent or pinched that comes out of the brake cylinders. This is dangerous and should be fixed immediately.

Posted on Sep 19, 2010

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3 Answers

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You might want to have a mechanic take a look at your
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I have a 97 chevy malibu the frpnt brakes are sticking . i have changed the pads,rotors, and brake lines. of u let it sit for a couple hours there free bit once u start to drive it they start to have drag...


Replace caliper slides and hardware grease with high temp or caliper grease. Clean caliper mounts if problem persists mounts could be warped or bent. Or worst case both wheel bearings are bad. Also check master cylinder by using block off plugs (remove lines at master cylinder and replace with brass plugs) if the pedal doesnt return properly the problem is the master cylinder.

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on the wheel that is hot, jack it up and see it the wheel spins free or drags? if it drags, then loosen bleeder on the caliper, it if now spins free, you want to replace that caliper hose, if it is still dragging, then the caliper piston is stuck and you will need to replace it.

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You need to have your brake pads replaced. They make that sound when they get worn down so you know to change them. There is a little piece of metal that rubs on the brake rotor to tell you this. Hope this helps

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Excessive dragging of new disc brakes


It's normal for new pads and rotors to have a "wear-in" period but only for say 50-100 miles of average driving... Disc brake DO get pretty hot, especially after prolonged or hard braking... (going down long hills or a lot of hard stops)... also front brakes actually supply 60% of stopping force... If they aren't to hot to touch the wheel or smoking you are probably OK... One thing to make sure of is that the pedal has "free play"... usually a fraction of an inch before the brake push rod actually pushes the master cylinder piston. Without this free play the brakes WILL drag all the time and wear prematurely... but unless you replaced the master cylinder or the locknut on the push rod adjuster has come loose it's rare to have that problem... The only other cause of this would be a malfunctioning ABS unit and you would feel a definite pulsation... Hope this helps...;-)

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