2000 GMC Truck Brake repair gone wrong?

Tiny
DOGSNPONIES
  • MEMBER
  • 2000 GMC TRUCK
  • V8
  • 4WD
  • AUTOMATIC
  • 110,000 MILES
I had taken my truck in for repair as the the brakes were making noise and slow to stop. When I picked up the truck I was advised that the brakes were not in need of repair but instead were cleaned and adjusted. The receipt read: "Remove dual rear wheels, inspect shoes, drums, wheel cylinders and hardware, replace and torque to specification".
A few weeks later the rear brakes seized and caught on fire on the highway necessitating a tow for the truck and a horse trailer. The brakes had to be drilled off of the truck and the truck required new rear brake shoes, wheel cylinders and adjustment. I was told by the mechanic that the linings were paper thin.
My question is- what did this first shop do wrong or not do at all?
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Wednesday, September 29th, 2010 AT 3:57 PM

7 Replies

Tiny
BLACKOP555
  • EXPERT
Sounds like they improperly adjusted the drum brakes causing them to rub too much. Either that or you had hot brakes and did some backing up causing the shoes to get much tighter then normal when they adjusted causing them to lock up.
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Wednesday, September 29th, 2010 AT 10:45 PM
Tiny
DOGSNPONIES
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No more backing up than 20 feet on either end of the trip. Consensus seems to be that the brakes were overadjusted. Would love to get some more input.
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Thursday, September 30th, 2010 AT 7:07 AM
Tiny
BLACKOP555
  • EXPERT
Any braking in reverse with hot brakes will cause them to over adjust no matter how far you go in reverse. You say you tow trailer. Well if it gets hot from towing and you back up brakes will over adjust unless lightly applied

take drums off and adjust brakes looser see if smoking stops. Let me know what happens
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Thursday, September 30th, 2010 AT 9:44 PM
Tiny
DOGSNPONIES
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I didn't back up at all that day.
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Thursday, September 30th, 2010 AT 9:57 PM
Tiny
BLACKOP555
  • EXPERT
You said a week later but if you say you didnt back up well move on.

Does trailer have electronic braking as long with truck equipped for it?

With the rear end up see if the wheels are turning. If not drums will have to come on and seals removed from the wheel cylinders to make sure they are not rusted inside causing seizure of the cylinders. If thats good and wheels wont turn brake open the bleeders on each side. Does this cause wheels to turn?

If so I would suspect a mis adjusted master cylinder since you say you replaced the lines.

If none of that was wrong then the other shop just adjusted it wrong.
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Friday, October 1st, 2010 AT 12:38 PM
Tiny
DOGSNPONIES
  • MEMBER
They are fixed now. Just trying to determine why they would have seized and caught on fire within weeks of alleged brake work?
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Friday, October 1st, 2010 AT 12:41 PM
Tiny
BLACKOP555
  • EXPERT
They could have adjusted them wrong or they were wrong when they just said it needed cleaning and readjustment. The wheel cylinders you said were replaced after brakes caught fire. Well they were probably replaced because they were seized up which caused the lock up in the first place.

First shop had issue with not being able to diagnose the root of your problem causing it to break later down the road
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Saturday, October 2nd, 2010 AT 1:02 PM

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