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GMC brakes repair questions and answers

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313 Questions
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  • AL
     
    • Paul
      9/15/2010 Paul
      typicaly there is a wheel speed sensor on each brake that might be dirty or faulty there should be a stored code in the computer that will tell you which one is faulty. take it to your mechanic or parts store and have the codes checked.
  • pgw906
    pgw906 - 1999 GMC Jimmy - Brakes - 9/15/2010
    How do you reset the brake proportioning valve
     
    • Ladiesman217
      9/15/2010 Ladiesman217
      For my Chevy C1500 1997 this is how i do it, im hoping that will give you an idea on how to do it since we have the same manufacturer

      Bleed the valve until the spool valve seeks its center and the light goes and stays off, all the while hold the centering button in while bleeding the valve.
  • pgsnipes
     
    • around
      9/10/2010 around
      again with this problem
      i can only tell you i have a bad right rear wheel abs sensor,
      some times it locks up and i have to stop so it will release.
      are your abs sensors locking up,and now the brake pads and rotors are shot?
  • Franklin Chisholm
    Franklin Chisholm - 2002 GMC Yukon Denali - Brakes - 9/9/2010
    I have no emergency brake
    I've replaced the pad,adjusted the pad to the hub adjusted the cable to the end,and still no brake.
     
    • HouseCallAuto
      9/9/2010 HouseCallAuto
      Have you looked at the parking brake shoe condition and adjustment by removing the rear rotors? Usually the material has fallen off at least one whole side of the shoe which causes too much brake shoe to drum clearance and uses up all the cable travel resulting in no parking brake function. There is also an adjustment inside the rotor to expand the show outward, a starwheel.
      HouseCallAuto
      9/14/2010 Franklin Chisholm
      I;ve done that,new brake shoe.could it be the wrong cable from the factory
  • pb&j
    pb&j - 1999 GMC Sierra 2500 - Brakes - 9/9/2010
    How much to replace entire brake lining
    Brake lining rusted due to salt exposer
     
    0 answer
  • vale de jesus
    vale de jesus - 2000 GMC Jimmy - Brakes - 9/3/2010
    Has no brake when brake pedal is depressed
    1-134523k miles ,upon brake pads inspection I relaced them .I didn't drove too far when noticed the rear tires draging so I replaced rear calipers.when bleeding found no fluid flow thru the bleeders also the brake light came on then I replaced the master cylinder ...
     
    • darkmind
      9/3/2010 darkmind
      Did you already check your proportioning valve?
      darkmind
      9/3/2010 darkmind
      Also check your bleeder screw it is possible that it is defective that’s why you can’t bleed air present in your brake system.
  • Mud Slinger
     
    • HouseCallAuto
      9/2/2010 HouseCallAuto
      Most likely cause is a bad turn signal switch (inside the column). Probability is greater than 75%. Here is a diagnostic that will confirm it >>

      1. Access the turn signal switch connector at the base of the steering column.

      2. Check for power on the White wire at the end terminal when the brake is applied. If no power, check at the brake light switch. There is an Orange wire hot at all times and the brake lamp switch sends power out the White when the brakes are applied.

      3. If voltage is OK at the turn signal switch on the White, jump the White to the Yellow and expect the left front rear stop lamp to come on when the brake is applied.

      3. Jump the White to the Green and expect the right rear stop lamp to come on with the brake applied.

      4. If the above test operates the rear lamps, replace the turn signal switch.
      HouseCallAuto
      9/2/2010 Mud Slinger
      Thank You, I will try this tomorrow after work when I have some daylight. I noticed another post with the same problem, he got the same answer but not as detailed as yours. Again Thank You Very Much. Hopefully this will solve the problem so I can go riding in the mountains.
      HouseCallAuto
      9/3/2010 Mud Slinger
      When I pulled the cover off of the steering column I seen the white wire was broken on the turn signal switch. That was the problem, now I have brake lights. Thank You Again, I never would have imagined the turn signal switch or in that area would have been the problem.
    • darkmind
      9/2/2010 darkmind
      Have you already check the brake light wirings/connections (if it is loose or disconnected) and bulb socket (for corrosion)?
      darkmind
      9/2/2010 Mud Slinger
      I took out light assembly to swap bulbs still had grease on bulb connector also unplugged and plugged connector back up. They told me at the parts store that it could be the mother board.
  • jbbrnr
    jbbrnr - 2001 GMC Savana 1500 - Brakes - 9/1/2010
    Hear thumping noise under front of vehicle when brakes are applyed.
     
    • Voltes V
      9/1/2010 Voltes V
      This is most likely caused by your front brake rotors are out of round just slightly and need to be resurfaced or replaced. The front brake pads are pulsating in and out because the brake rotor has a small high spot on it causing the brake pads to pulsate. You can probably feel this pulsation in the brake pedal or in the steering wheel as well…usually.

      I would inspect the front brake rotors and front brake pads and at least resurface the front brake rotors.

      You can rule out the rear brakes as the culprit by stopping the car just using the hand brake. In a deserted parking lot with no other vehicles behind you, at 30 MPH, slowly pull up on the hand brake (hold the release button down with your thumb to make a slow and gradual stop) until the vehicle stops. The hand brake only utilizes the rear brakes so if you do not hear the noise, the problem is likely to be caused by the front brakes.
  • coralee53144
    coralee53144 - 2001 GMC Savana 1500 - Brakes - 8/26/2010
    When applying brakes sounds like hitting -clunking sound check drive shaft replaced brake shoes replaced inner outer
    wheel bearings replaced rear end gears an brake drums im stumped
     
    • darkmind
      8/25/2010 darkmind
      Did you already check the condition of your brake rotor and brake backing plate?
    • coralee53144
      8/26/2010 coralee53144
      sorry forgot to add that to the list yes the roters were replaced .along with new drums new brake shoes all the brake springs rebuilt rearend inner outer wheel bearings
  • sweetpea
    sweetpea - 2001 GMC Yukon XL 1500 - Brakes - 8/26/2010
    The ABS light and Break light come on and stay on, was told this was a sensor light defect and ways to fix this
    ABS lite and Break light want to stay on, was told it was a defective sensor light.Anyway to fix this.
     
    • AutoMD Member
      8/26/2010 AutoMD Member
      I had a car not long ago doing the same thing . I found two problem . a bad wheel sensor ( it had an open in the sensor ) and a bad control modual . The car I had also would loose the speed-o ,and the car acted like the brakes were applied . This started out as a intermtent problem and got werse in time . I hope this helps . If you have more ?
      about what I have said repost and I will try to answer ! good luck
  • EWill
    EWill - 2005 GMC Envoy - Brakes - 8/25/2010
    Why is there a grinding and rattling noise coming from my wheel?
    This sound occurs all the time I am driving.
     
    • Bobby
      8/25/2010 Bobby
      grinding and rattling could be a bad wheel bearing or grinding brakes possibly? it only comes from your wheel while moving correct?
  • Juan Figueroa
    Juan Figueroa - 1982 GMC C5000 - Brakes - 8/22/2010
    When I apply my brakes only the right front tire brakes pulling the truck to the right i have four wheel drum brakes ?
    I cannot find anything for a four wheel drum brake system does anyone know about this truck?
     
    • HouseCallAuto
      8/22/2010 HouseCallAuto
      I would tell you to replace the shoes first in the front, during the shoe replacement verify that the wheel cylinder at both front wheels are not frozen by moving both pistons inward with the tip of a screwdriver, and after the job is assembled with the front drums either new or resurfaced, road test it to verify no pulling. If there is still a pull like before, replace both front brake hoses. That should do it.
  • avecchio
    avecchio - 2000 GMC Sierra 1500 - Brakes - 8/20/2010
    Anyone having constant rotor rustout
    Purchased truck new & do not abuse it. Seems like every year for the past 4 years, i had to have brakes & rotors on all 4 wheels replaced. Am getting under 8,000 miles on rotors before they rust out. Also had brake fluid line rot out. My ABS kicks in on occasion ...
     
    • litvak54
      8/20/2010 litvak54
      The rotors on GMC trucks like mine are always rusting out because of little driving, brake dust corrosion, parking on a gravel driveway or over puddles for extended periods. Could someone in a dry climate chime in? How are YOUR GMC truck rotors?
  • kyle
    kyle - 2003 GMC Sierra 2500 HD - Brakes - 8/9/2010
    How to get the brakes to quit holding
    the breaks will not release some times and i have changed the booster, both front brake lines and its only in the front, and it started before i changed any thing.
     
    • darkmind
      8/9/2010 darkmind
      It is possible that your front bearings are out of adjustment or it is defective. Other possibilities are

      •Defective brake caliper

      •Brake pads are loose from their mounting or it is damaged

  • beachlol
    beachlol - 2002 GMC Envoy - Brakes - 8/9/2010
    How to get into the top rear brake light?
    112,000 miles. The rear top of the back door brake light does not light up when you depress the brakes and I cannot find how to get into this light assembly to replace the bulb. The check engine light is not on and there are not any other brake lights not working. ...
     
    • Bobby
      8/9/2010 Bobby
      the washer is probably the pump in the fluid tank.

      as for the top rear brake light, open the tail gate there are two retaining pins in the headliner that need to be rmoved behind that there is the electrical connector to disconnect. then close the lifgate and open the liftgate window. then there should be two screws to remove and that removes the hole unit. Pretty much you have to get to it from the rear of it by roming the panel and then you will be able to access the connector and screws