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2002 GMC p/u brake failure
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sbarker
New User
Sep 25, 2011, 11:16 AM
Post #1 of 7
(3369 views)
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2002 GMC p/u brake failure
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2002 GMC p/u brake failure. When I turn and brake at the same time, I hear a strange noise from my pedal area and the brakes release. Brakes work fine going straight, only fail when I'm turning. I changed front pads and rotors but did not fix the problem
(This post was edited by sbarker on Sep 25, 2011, 11:30 AM)
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Sep 27, 2011, 9:59 AM
Post #2 of 7
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Re: 2002 GMC p/u brake failure
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Hmmm? Probably a problem with ABS but a light should be on. Quick test is pull the fuse if problem goes away then get codes read as I think the system is confused - guessing, T
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sbarker
New User
Sep 27, 2011, 2:43 PM
Post #3 of 7
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Re: 2002 GMC p/u brake failure
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Yes ABS light is on. I'll try your suggestion . A friend suggested the power booster was going bad. What do you think about that?
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Sep 27, 2011, 3:36 PM
Post #4 of 7
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Re: 2002 GMC p/u brake failure
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OK: Typical brake booster (probably) have a couple common issues. Most are storing engine vacuum which is highest when not accelerating and a check valve to give you reserve if you were. No harm in checking that hose to it is all intact. A test that it holds would be to feel the boost even overnite with engine off for at least one pump of pedal. If you waste the reserve pedal should go HARD not soft on you and when engine started you can feel it normal again soon. When ABS light is on normally you just have regular brakes but there's more going on with this, T
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sbarker
New User
Sep 28, 2011, 5:05 PM
Post #5 of 7
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Re: 2002 GMC p/u brake failure
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I pulled brake fuse and I was amazed that it worked. Thanks for the help. What does that fuse control. My cruise control doesn't work with that fuse out? What do I do now? Do I have the codes reset?
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 28, 2011, 5:09 PM
Post #6 of 7
(3243 views)
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Re: 2002 GMC p/u brake failure
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You were getting a false activation of the ABS system because one of the speed sensors is inaccurate at low speeds and the computer reads that as a brake lockup. It is quite common on these trucks and the problem is usually one of the from hub bearing which houses the speed sensors. The ABS system will store a code to tell you which wheel but you may have erased them by pulling the fuse. Put the fuse back in and after the light comes back on, have the ABS codes read to find out which wheel is the problem. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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sbarker
New User
Sep 29, 2011, 2:51 PM
Post #7 of 7
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Re: 2002 GMC p/u brake failure
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OK, thanks for the help.
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