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2000 Chevy S-10 excessive brake pedal travel

Tiny
JMOYER101
  • MEMBER
  • 2000 CHEVROLET S-10
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 77,000 MILES
Recently my brake pedal travel has increased, requiring more foot pressure to stop truck. I come to a light, for example and stop, after I stop, then I need to push brake pedal down more because truck starts to creep and roll.
I have inspected asll four wheels for fluid leaks.
I have completely flushed old brake fluid.
I have bled the entire brake system.
And I have replaced master cylinder.

The problem still exists. I have purchased and received a new ABS pump module but have not installed it yet.

I have also visibly checked vacuum boost lines for leaks and could not see a problem.

Any ideas?
Also The brake fluid level does not go down (no fluid leaks)
Thank you very much, Jens Moyer
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Saturday, March 21st, 2009 AT 1:53 PM

1 Reply

Tiny
F4I_GUY
  • MECHANIC
  • 3,302 POSTS
If the pedal raises after you pump it at a light then you have air trapped somewhere in your system.

If you did not properly bench bleed the master cylinder, that is most likely your problem. Also, your abs modulator may have a specialty bleeder on it or there may be a special bleeding procedure for it.
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Saturday, March 21st, 2009 AT 2:04 PM

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