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My brakes lock up?

Tiny
BGS1
  • MEMBER
  • 2005 GMC SIERRA
  • 180,000 MILES
After I drive for a about 10 miles and the truck warms up the brakes start to lock. It feels like I have my foot on the brakes. When I stop and the truck cools down it drives fine until it warms up again
Sunday, March 25th, 2012 AT 12:46 AM

2 Replies

Tiny
BILLYMAC
  • MECHANIC
  • 2,204 POSTS
This happens when the brake booster push rod is adjusted out too far which does no allow the brake master to return fully holding the brakes on. To confirm the issue loosen the brake master mounting bolts 3 turns to see if the car starts to roll again, if so remove the master and adjust the booster push rod inward. Also a brake flex hose can come apart internally causing a short of check valve in the system but this is usually isolated to one brake either front or rear.
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Saturday, May 8th, 2021 AT 12:55 PM
Tiny
GEEGEE
  • MEMBER
  • 1 POST
I had to replace the brake booster because the adjusting rod was seized.
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Saturday, May 8th, 2021 AT 12:55 PM

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