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GMC brakes repair questions and answers

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  • AutoMD Member
    AutoMD Member - 1988 GMC C1500 - Brakes - 1/1/2014
    Is there a test for the speed sensor for the abs system at the tranny.
    the dash brake light is on. I checked connections at the abs near master cylinder, does not appear to be service brake related. rwal not working.
     
    • HouseCallAuto
      1/1/2014 HouseCallAuto
      The abs wheel speed sensor for the RWAL brakes is under the rear brake drums and not at the tranny. The sensor can be tested with an ohmmeter and also by reading data on a scanner equipped with abs software and / or you can flash out trouble codes easily by jumping two terminals, this should help at this page >> http://autorepair.about.com/library/faqs/bl863a.htm
  • AutoMD Member
    AutoMD Member - 1993 GMC C1500 - Brakes - 12/17/2013
    why does brake light stay on until u apply brake
    started when I had to slam brake when lady pulled out in front of me
     
    • HouseCallAuto
      12/17/2013 HouseCallAuto
      You mentioned nothing about the quality of the brake pedal. Did the pedal change what it feels like after the light came on or after your emergency braking that you did?
  • AutoMD Member
    AutoMD Member - 2005 GMC Envoy - Brakes - 11/9/2013
    No brakes even with engine running
    When driving thees no brakes also with engine in park the vehicle rolls.. eventually will stop 10 ft away. Replaced the front disc pads
     
    • HouseCallAuto
      11/9/2013 HouseCallAuto
      Details please. This is not enough to work with. Make your details so explicit it will make me feel like I am there. No generic / ambiguous terms like (no brakes). Tell me exactly what the brake pedal is doing. Does it go to the floor? Is the pedal a hard pedal but it does not go to the floor? When did this begin to happen, from one day normal and the next day "no brakes" ? I am guess ing that maybe what you are trying to describe by saying "no brakes" is really "no power assist" ?
  • rlhanson58
    rlhanson58 - 2008 GMC Acadia - Brakes - 11/3/2013
    How do i reset the abs warning light and the trraction control stablizing tract
    the alert lights keep coming on as well as the blinking sound while i am driving
     
    0 answer
  • AutoMD Member
    AutoMD Member - 2000 GMC Yukon - Brakes - 10/30/2013
    Air escaping from around the brake pedal linkage when brake pedal pushed. Vehicle very hard to stop.
    I have replaced rotors pads, shoes, drums, master cylinder and bled the lines and MC. Whenever I apply the brakes I hear a hissing sound which I have identified as air escaping from around the rod going through the floor board, presumably to the braking system. ...
     
    • HouseCallAuto
      10/30/2013 HouseCallAuto
      Replace the brake vacuum booster assembly. Not that hard to take out. Hardest part is using swivel soeckets and extensions and having to twist yourself to get under the dash to access the fasteners and rod.
  • Janet
    Janet - 2010 GMC Sierra 1500 - Brakes - 10/17/2013
    Back up light stays on or does not come on
    Passenger side back up light stays on all the time or does not come on at all. no other issues with vehicle
     
    0 answer
  • Janet
    Janet - 2010 GMC Sierra 1500 - Brakes - 10/17/2013
    Why does passenger side back up light not go out or not come on?
    the back up light will either stay on all the time or not come on at all, no other issues are occurring no warning lights or indicators are on
     
    0 answer
  • isom5539
    isom5539 - 1996 GMC K1500 - Brakes - 9/30/2013
    Why does my truck make a grinding sound that seems to be coming from the brakes?
    136k miles. Both rear wheel cylinders were blown out so I replaced the wheel cylinders, brake shoes, and the springs on both rear drum brakes. That didn't fix the grinding noise which happens when I am in reverse, first gear, and occasionally when I am in second and ...
     
    • jhepot
      9/30/2013 jhepot
      How about the bearing did you check. Or maybe something got bent when you werechanging and touching against the drum
    • HouseCallAuto
      9/30/2013 HouseCallAuto
      You need to add more detail to this, more info. What you said is just not enough for me.
  • isom5539
    isom5539 - 1996 GMC K1500 - Brakes - 9/30/2013
    Why does my truck have a grinding sound from the brakes when im in low gears?
    My truck makes a grinding sound when Im in first gear and occationally in second gear. My transmission fluid is clean. I replaced the wheel cylinders brake shoes and springs on both rear drum brakes but it still grinds. I know it is not my transmission and believe ...
     
    0 answer
  • cwidtow
    cwidtow - 2001 GMC Sierra 1500 - Brakes - 9/23/2013
    Why does ABS seem to activate at very slow speed and almost at complete stop.when not on slippery surface?
    mileage 95,000. ABS activation is intermitant. No warning lights are on. Calipers replaced. Some rusted brake lines replaced.
     
    • bear.1216
      9/23/2013 bear.1216
      This is common problem on these vehicles. The ABS will activate at slow speeds or creeping stops and it rolls thru stops. This is caused by faulty wheel speed sensor. The sensor usually will not give ABS code until it fails completely. You have to hook up diagnostic scan tool to read the live sensor data while test driving vehicle. When you make a slow stop or recreate the problem you will likely see the wheel speed of the bad sensor drop down to 0mph before the others. The sensor that drops out signals that the wheel is locked up and the ABS activates and releases pressure to that wheel. Because the ABS dumps the pressure to a working system you lose all braking power. Replace the bad sensor and it should be fixed. It is normally a front sensor that causes this.
  • cwidtow
    cwidtow - 2001 GMC Sierra 1500 - Brakes - 9/22/2013
    Why does ABS seem to activate at very slow speed and almost at complete stop.when not on slippery surface?
    mileage 95,000. ABS activation is intermitant. No warning lights are on. Calipers replaced. Some rusted brake lines replaced.
     
    • HouseCallAuto
      9/22/2013 HouseCallAuto
      One of the front hub bearings is junk. There *might* be a stored abs code but if you can't read GM abs codes then that won't work as a direction. That leaves you with jacking up each front wheel and spinning and wiggling each and basically going with a hunch on whether the left or right hub bearing should be replaced. the wheel speed sensor is integral with the hub bearing and when the bearing gets play in it it causes false abs activation.
  • jrlaramore
    jrlaramore - 1993 GMC C1500 - Brakes - 9/7/2013
    Does check engine light come on when a brake caliber sticks
    my caliber got stuck and got very hot,engine light came on.Is this possible or related to something else?
     
    • bear.1216
      9/6/2013 bear.1216
      Scan the engine for codes to be sure but a stuck caliper will not directly cause light. Your engine would have to work extra hard to move the vehicle with dragging brakes. You should check then erase code then fix brakes road test vehicle and recheck code if light returns. If you post the code I could help more.
    • John's Auto Repair
  • diana
    diana - 2003 GMC Sierra 1500 - Brakes - 7/18/2013
    Should I need rotors if no pulsating.
    Am changing pads
     
    • John's Auto Repair
      7/18/2013 John's Auto Repair
      Generally speaking, no.
    • Mayor
      7/18/2013 Mayor
      If the rotors are scored or warped, they need to be replaced. If there is no "pulsing" they are probably not warped. If they are scored they will shorten the life of the new pads and reduce the braking ability of the vehicle.
  • Cleve
    Cleve - 1995 GMC C2500 Suburban - Brakes - 6/29/2013
    Left front brake pulls to left and overheats when the weather is hot! What causes this?
    Both front wheel rotors, pads and remanufactured calipers have been replaced. When the weather is hot and you apply the brakes, it wheel pull to the right first and then as you release the brake pedal the left front wheel-brake will continue to pull to the left and ...
     
    • Jimm
      6/29/2013 Jimm
      Several possibilities; faulty / collapsed flexible brake hose at the caliper, dirty / contaminated brake fluid in the system, faulty / sticking left front brake caliper and piston.
      Jimm
      7/12/2013 Cleve
      Thanks Jim...replaced left front flexible brake hose and that corrected the problem...Cleve
      Jimm
      7/12/2013 Cleve
      Thanks Jim...it was the flexible brake hose! Now my brakes work normal...Cleve
  • angelaldi
    angelaldi - 2004 GMC Yukon - Brakes - 6/9/2013
    HOW MUCH FOR REPLACE BRAKES
     
    • Jimm
      6/9/2013 Jimm
      Check the many on-line auto parts sources, such as; www.autopartswarehouse, www.carpartswarehouse.com, or www.rockauto.com for the replacement parts.
      Jimm
      6/9/2013 CVO
      See this url http://www.automd.com/repaircost/

      to estimate labor and parts.