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1997 GMC K1500 Z71 Rear Brake Failure After Repair


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Repute3619
Novice

May 26, 2012, 2:09 PM

Post #1 of 5 (2842 views)
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1997 GMC K1500 Z71 Rear Brake Failure After Repair Sign In

The vehicle is a 1997 GMC Sierra K1500 Z71.

After replacing the front brake pads, the extra pressure made the brake line leading to the rear burst. Also upon replacing the brake pads, it was discovered that the front drivers side bearings were worn out. The front drivers side hub was replaced and is working great. The brake line leading to the rear was replaced, brake lines were bled and now the brake pedal goes all the way to the floor and only the front brakes are working.

After the repair the rear brakes were not working, I pumped the brakes quite a few times then went to back out of my driveway and the rear passenger side brake locked up after about 6 ft. out of my driveway. The rear was jacked up and after attempting to move the wheel by hand it released. There are still no rear brakes at all after driving it around the country a little to avoid any other vehicles incase the locking up occurred again.

(EDIT) I wanted to add that since the repair the brake light on the dash is now on.

I was hoping for any advice on what the issue may be now.

Most recent related repairs include a front drivers side brake line leak 16 months ago. At the time the brake pedal was going most of the way to the floor and soon after a leak started to appear. The line was replaced and everything brake related was working fine up until the hub and brake line replacement that was done today (05/26/2012).


(This post was edited by Repute3619 on May 26, 2012, 2:16 PM)


Tom Greenleaf
Ultimate Carjunky / Moderator


May 26, 2012, 2:13 PM

Post #2 of 5 (2836 views)
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Re: 1997 GMC K1500 Z71 Rear Brake Failure After Repair [In reply to] Sign In

Line that broke probably was from rust and was waiting to happen anyway. This locking up thing means rears need total inspection, parking brake and all. If brakes were bled doing the fronts, the master cylinder could have taken a hit. Techs should be able to figure this out in stride,

T
_________________________________________
Long retired now


nickwarner
Veteran / Moderator


May 27, 2012, 6:03 PM

Post #3 of 5 (2753 views)
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Re: 1997 GMC K1500 Z71 Rear Brake Failure After Repair [In reply to] Sign In

Did you use a proportioning valve depressor tool on the ABS unit when you bled it? If not you'll never get it go right. Costs about $35 from OTC, local parts stores can order one in.


Repute3619
Novice

May 28, 2012, 12:40 AM

Post #4 of 5 (2727 views)
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Re: 1997 GMC K1500 Z71 Rear Brake Failure After Repair [In reply to] Sign In

Finally figured out the problem. The wheel cylinder! Also replaced a rear brake line and reset the ABS. Everything seems to be working great. Thanks for all the help. If anyone has any comments on problems they think may arise or otherwise, I'd be glad to hear! Thanks again everyone.


Tom Greenleaf
Ultimate Carjunky / Moderator


May 28, 2012, 3:56 PM

Post #5 of 5 (2717 views)
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Re: 1997 GMC K1500 Z71 Rear Brake Failure After Repair [In reply to] Sign In

So far so good - hope you did both sides as protocol with brakes is to do just that and if one failed the other probably isn't far behind,

T
_________________________________________
Long retired now




1997 GMC K1500 Z71 Rear Brake Failure After Repair


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