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GMC brakes repair questions and answers

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317 Questions
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  • Hollis
    Hollis - 2003 GMC Sonoma - Brakes - -110 minutes ago
    ABS Light and brake light comes on. How difficult to fix?
    Just replaced front brake pads
    • Teddy B
      -110 minutes ago Teddy B
      You would have to know what the problem was before anyone
      could weigh in on the difficulty part

      If the front pads were replaced I would think someone put the
      problem in there from sloppy work
  • 812dobie420
    812dobie420 - 1998 GMC C1500 - Brakes - 12/10/2014
    Why doesnt my breaks fell spongy after changing rear end and wont let bleed break line
    Changed rear end from 3:73 to 3:42 does this matter
    • Teddy B
      12/10/2014 Teddy B
      How are you bleeding the brakes? Need two people to do that

      You have to do all four corners & any abs module

      Not supposed to feel spongy (you got it backwards)
      Teddy B
      12/10/2014 812dobie420
      Just dont have a peddle and light is on took to shop they said they couldnt fix it due to ratio being off
    • Teddy B
      12/10/2014 Teddy B
      They can bleed the brakes & resolve that issue
      You can do that yourself as well

      The front drive shaft you remove for now

      Then you rebuild/repair your old axle houseing or switch
      the gears to the new one
  • crouchmoney
    • clinton sampson
      12/7/2014 clinton sampson
      there is a control box under hood on firewall it was a recall but they said its too late but they have a replacement
  • mike
    mike - 2000 GMC Jimmy - Brakes - 12/2/2014
    What is the torque setting on 2000 Jimmy 4x4 front wheel bearing hub nut?
    I've heard numerous figures from 90-200 ft lbs. That's quite a wide range. I want to know correct answer…
    0 answer
  • mfree1
    mfree1 - 1997 GMC Sonoma - Brakes - 9/22/2014
    Brake light goes out if press brake hard
    When brake is pressed softly you can hear the first of three contact in brake switch make and brake lights come on. If you push harder you will hear another set of contacts click and brake lights go out. So anytime you press hard on the brake, the brake lights will ...
    • jdl
      9/22/2014 jdl
      At the moment, I suspect your brake switch. If the position of the brake switch is adjustable, I guess you could try adjusting?
  • Drew ingram
    Drew ingram - 2004 GMC Savana 3500 - Brakes - 9/20/2014
    Why such a violent shaking when going 45mph and hit the brakes
    Changed shoes , calipers and rotors to no avail
    • Wray's Auto Service
      Replace or machine front brake rotors should solve this issue.
    • Jimm
      9/20/2014 Jimm
      If the front brakes are OK - new pads, brake shoes and rotors, then check the front wheel bearings - be sure the bearing preload (tightness / looseness) when the rotors are installed is OK.
  • Nester Espiritu
    Nester Espiritu - 2007 GMC Savana 3500 - Brakes - 9/19/2014
    i am working on GMC savana ABS light is on but I cannot communicate with EBCM, all other modules has no communication problem and the only code I got is U1000, I have a power and ground to the EBCM, purple wire and brown wire are ok LB wire is also intact. DLC ...
  • Mike
    Mike - 2004 GMC Sierra 2500 - Brakes - 8/24/2014
    Brake calipers. Froze up. One at a time, but all 4
    Replaced LF caliper due to lock up, very shortly after RF caliper locked up. After replacement immediately Rear calipers locked up. Any suggestions would be appreciated. Thanks in advance.
    0 answer
  • ethanator
    ethanator - 1988 GMC K1500 - Brakes - 8/23/2014
    Since i don't got much room in the question box so i will put it all down in the additional details part
    I have a 1988 Gmc Sierra 1500 , it is lifted and has 35s . my brakes are soft. This is after i replaced the brake booster , and the master cylinder. Anyone have any ideas I don't know what to do next already put 200$ worth of parts on it , which didnt fix the ...
    • alex
      8/23/2014 alex
      is it posable one of the wheel cylinders got put in wrong. upside down would make it hold air and not bleed out. also are they soft or do they bleed down push soft and see if it slowly goes down. i have had bad new master cylinders. a weak line can swell with the pedal and give a soft feel also.
  • AutoMD Member
    AutoMD Member - 1995 GMC C1500 - Brakes - 8/17/2014
    Do I have a bad ABS unit?
    I have done some recent repairs to this truck. I had to run some new brake line also. I can bleed the brake system, and get good brake pressure. After sitting for a couple of hours, there is no brake pressure. You can get some of the pressure back by pumping the ...
    • alex
      8/17/2014 alex
      google the abs brake bleeding procedure try that first. your abs controller should throw a code if it fails you brake light that turns on when low on brake fluid will flash a code but what you described sould like you just need to bleed abs systome.
  • Drew ingram
    Drew ingram - 2004 GMC Savana 3500 - Brakes - 8/8/2014
    Why does this vehicle shake violently when brakes a re applied around 45mph
    New brake shoes, calipers and rotors were put on to no avail
  • olivetree
    olivetree - 2003 GMC Envoy - Brakes - 8/8/2014
    What is causing the brakes to apply themselves on turns only. (left or right)
    When making turns the brakes (what feels like the brakes) apply themselves. If at a very slow rate of a turn, it actually stops the vehicle. I've checked the front rotors, pads, brakes lines, & wheel wells for some sort of visible damage or rubbing & I have found ...
  • AutoMD Member
    AutoMD Member - 1998 GMC Savana 3500 - Brakes - 7/12/2014
    What is double flaring of a brake line ?
    Auto parts store told me to double flare the brake line . How do I do that , and why ?
  • Vicki
    Vicki - 2003 GMC Sonoma - Brakes - 6/16/2014
    Tail light and signal (rear) passenger side do not work, changed bulb but still didn't work. What could it be.
    There is a small box in there what is that called so I can replace it.
    • Boe
      6/3/2014 Boe
      it could have something to do with the fuse check those
      next could be the light switch
      [email protected] let me know
    • 63 Volvo
      6/16/2014 63 Volvo
      also check the trailer hitch wiring harness
  • olivetree
    olivetree - 2003 GMC Envoy - Brakes - 6/16/2014
    What is causing the brakes to apply themselves on turns only. (left or right)
    When making turns the brakes (what feels like the brakes) apply themselves. If at a very slow rate of a turn, it actually stops the vehicle. I've checked the front rotors, pads, brakes lines, & wheel wells for some sort of visible damage or rubbing & I have found ...
    • GT500Knights
      6/16/2014 GT500Knights
      Is your vehicle equipped with 4wd? This might not be possible, but it happened on my car: the electronic 4wd shift motor got stuck into 4hi on my vehicle one time. on my car, 4hi is only meant for off roading where there is loose traction. if 4hi is used on pavement, trying to make turns can damage the differentials--however what i had also noticed is that making turns on pavements drastically slowed down the vehicle. it was fine driving straight. so, this is one possible scenario.

      So when making turns is the braking effect feel like someone is actually stepping on the brakes? Or is the braking effect more gradual? Only other things I could think of would either be alignment severely messed up (toe and/or camber), steering linkage to one or both wheels severely damaged, or differential/transaxle internal damage.
      6/24/2014 olivetree
      Thank you for your time & reply.
      Your right it was on 4hi, i've put it back on 2wd & it is running fine