UKC Forums - chevy 1500 brake problems??

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Posted by RANDY GIBSON on 08-07-2014 01:01 AM:

chevy 1500 brake problems??

I've replaced calipers, rubber brake lines, but after a few miles it starts holding pressure on the front brakes, and I have a full pedal---anybody know whats wrong?

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Posted by s payne on 08-07-2014 01:28 AM:

Jack front wheels up off ground and unbolt master cylinder from brake booster if wheels free up probably booster if they don't free up crack the front brake line loose at master cylinder and if wheels free up probably master cylinder

Posted by groworg1 on 08-07-2014 03:36 AM:

contaminated master cylinder most likely power steering or another petroleum product causing all rubber parts in brake system to swell replace master and flush with dot3 hope this helps

Posted by RANDY GIBSON on 08-08-2014 02:05 PM:

new master cylinder today-- hope this do'es job

Posted by wbond on 08-08-2014 02:08 PM:

Just buy a Ford is what Price said

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Posted by RANDY GIBSON on 08-08-2014 02:15 PM:

contaminated master cylinder most likely power steering or another petroleum product causing all rubber parts in brake system to swell

not unless someone else did it?? lol

Posted by Cory Langford on 08-08-2014 11:28 PM:

My truck is having the same issues. Everything in the entire brake system has been replaced four times, with no luck. It's had three different Boosters and four master cylinders on it, all the brake lines of been changed and multiple calibers. And we have flushed the system several times plus replaced the ABS modual three times. The truck is a 2007 GMC Sierra 1500. I've been trying to get it fixed now for two and a half years and the brakes just locked up again on of the other day and the Mechanic had to have it towed back to the shop.

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Posted by corky crowder on 08-09-2014 12:32 AM:

RANDY
DONT KNOW ABOUT BREAKS BUT CHANGED HYDRAULIC CLUTCH ON A FORD WOULD WORK FINE THEN DRIVE IT A WHILE CLUTCH WOULD START SLIPPING BLEED IT OFF WOULD BE FINE AGAIN FINALY JUST KEPT BLEEDING IT USED ALMOST 2 QT OF BREAK FLUID TOWARD THE END GOT AIR ON ONE BLEED AFTER THAT WORKED FINE .

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Posted by mnb&t on 08-09-2014 01:28 AM:

quote:
Originally posted by groworg1
contaminated master cylinder most likely power steering or another petroleum product causing all rubber parts in brake system to swell replace master and flush with dot3 hope this helps

that's what I would guess to. were any of the rubber components swelled? seal under cylinder lid, outer seals on brake calipers ect??? petroleum wrecks anything rubber in brake system until completely flushed. good luck.

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Posted by Slowpoke 2012 on 08-09-2014 03:46 PM:

quote:
Originally posted by Cory Langford
My truck is having the same issues. Everything in the entire brake system has been replaced four times, with no luck. It's had three different Boosters and four master cylinders on it, all the brake lines of been changed and multiple calibers. And we have flushed the system several times plus replaced the ABS modual three times. The truck is a 2007 GMC Sierra 1500. I've been trying to get it fixed now for two and a half years and the brakes just locked up again on of the other day and the Mechanic had to have it towed back to the shop.

Buy your parts from a different place.

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Posted by Cory Langford on 08-10-2014 11:50 PM:

We have bought parts from several different places. It's been to the dealer and several mechanics.

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Posted by RANDY GIBSON on 08-11-2014 07:21 PM:

master cylinder seems to have been the problem--so far??
time will tell

Posted by RANDY GIBSON on 08-19-2014 11:42 PM:

Master cylinder helped but, did not correct problem-- still holding alittle pressure-- someone told me that the spring
in these cylinders is to strong-- need to drill a small hole
in the outlet coup in master cylinder--says it the only way to correct the problem!!!

Posted by pttm08 on 08-20-2014 02:16 PM:

Randy,
I had a constant squeak in mine a while back. I could not get rid of it, took to a guy and the slider pins on my calipers were sticking from time to time. Put new ones on and have not had a problem since.

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Posted by RANDY GIBSON on 08-20-2014 04:02 PM:

mike, new calipers, new master cylinder-- has not corrected the problem

Posted by Cory Langford on 08-20-2014 11:23 PM:

My mechanic got in contact with General Motors. They think it is the proportioning valve. They sent one for my pick up and it was installed Friday and it is being tested out now I'll let you know if this helps the problem.

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Posted by RANDY GIBSON on 08-21-2014 01:34 AM:

cory,

please do, I'm at my witts end, an knowbody around here
knows whats wrong

Posted by Cory Langford on 05-26-2015 03:43 AM:

Re: cory,

quote:
Originally posted by RANDY GIBSON
please do, I'm at my witts end, an knowbody around here
knows whats wrong

did you get your truck fixed

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Posted by RANDY GIBSON on 05-26-2015 02:09 PM:

yes sir, after spending 1000 bucks, it's the brake line running to close to the exhaust system. The fluid was getting hot putting pressure on my calipers. I used 2 pop cans for a heat shield an it's been fine.

Posted by Driftwoodblue on 05-27-2015 01:52 PM:

who?

quote:
Originally posted by RANDY GIBSON
yes sir, after spending 1000 bucks, it's the brake line running to close to the exhaust system. The fluid was getting hot putting pressure on my calipers. I used 2 pop cans for a heat shield an it's been fine.

who or how did that get figured out?

Posted by RANDY GIBSON on 05-27-2015 02:15 PM:

I just happened to be checking it, and the brake line about burned blisters on my finger tips!!! the brake fluid was all most to the boiling point

Posted by chuck west on 05-27-2015 03:30 PM:

quote:
Originally posted by RANDY GIBSON
I just happened to be checking it, and the brake line about burned blisters on my finger tips!!! the brake fluid was all most to the boiling point

Any way you could post a pic of what you done ,,might help some of us other guys like me that's not too smart about figuring out/trouble shooting problems .

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Posted by bigtimberkennel on 06-01-2015 12:22 AM:

quote:
Originally posted by RANDY GIBSON
yes sir, after spending 1000 bucks, it's the brake line running to close to the exhaust system. The fluid was getting hot putting pressure on my calipers. I used 2 pop cans for a heat shield an it's been fine.

Sometimes it's the simple little things that run ya nuts,glad ya got it took care of.

Posted by Jonathan Crump on 06-01-2015 03:12 AM:

I put header wrap on my rear line close to the exhaust.

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Posted by mnb&t on 06-01-2015 09:22 AM:

glad you figured it out! was this factory exhaust?

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