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Silverado & Fullsize Pick-ups The Silverado has been one of the best selling trucks in the US for decades, and is truly proven to be "like a rock".

2014 Chevy Silverado
Platform: Truck, GMT 400, 800, & 900
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  #1  
Old 05-23-2011, 06:01 PM
CF Beginner
 
Join Date: May 2011
Posts: 3
Cool Brakes not releasing

I have new rotors, calipers, pads, and bearings.

When I apply pressure to the brakes they will not release. If I open the bleeder screw they release. As far as I can tell its only the front. I did already bleed the whole system as well.

The brake system is all the same as a chey 1 ton of the same or similar year. It has the bendix type calipers w/ hydro-boost.

I have never worked on a hydro-boost so there may be something I am missing, or its the master cylinder. Just wanted a second opinion before replacing it.

it is a 78 g30 motorhome dually
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Last edited by CDREANDRADE; 05-23-2011 at 06:05 PM.
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  #2  
Old 05-24-2011, 10:58 AM
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Join Date: Nov 2010
Posts: 368
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Sometimes the hoses can fail and act as a check valve.Try opening the lines at various points to locate the restriction.
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  #3  
Old 05-24-2011, 09:01 PM
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Quote:
Originally Posted by OLD WRENCH View Post
Sometimes the hoses can fail and act as a check valve.Try opening the lines at various points to locate the restriction.
Is there a solution I could run through the lines or just unhook and let gravity bleed or pump through?

It did seem like it was taking excessive pressure to stop abruptly.
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  #4  
Old 05-25-2011, 09:30 PM
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Nothing I know of.
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  #5  
Old 05-26-2011, 04:42 PM
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It was indeed both front brake hoses were bad. Thanks for your help.

Chris
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  #6  
Old 05-27-2011, 08:29 AM
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Thanks for lettin us know. For future reference the rubber parts on something that sets around fail rather fast. Keep an eye on hoses,belts,and tires.
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  #7  
Old 05-27-2011, 08:39 AM
CF Beginner
1984 Chevrolet Impala
 
Join Date: May 2011
Location: Nashville TN.
Posts: 1
Default 84 305 wont run well with coolant sensor

I am new and cant figure out how to post!84 Impala 305 4 barrel 70,000 ACTUAL mi.wont run well with coolant sensor hook up dead miss and loss of power, unhooked runs much better at about 90 %,,,,if you can start me in the right direction i would appreciate it.Will not run good with replacement of TX1,2 wire sensor.I wonder if i found wire for new TX1 temp. sensor would it fix it,ALSO IS THIS POSTED IN THE RIGHT PLACE

Last edited by rogo; 05-27-2011 at 07:56 PM. Reason: more info
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  #8  
Old 05-27-2011, 10:53 AM
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Thanks for good info here.
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Old 05-27-2011, 10:53 AM
 
 
 
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06, 95, brake, brakes, caliper, chevy, completely, fully, passenger, pickup, pressure, release, releasing, silverado, wont


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