Auto Answers » Brakes » GMC » Page 10

GMC brakes repair questions and answers

Post your GMC brakes question or share what you know by answering questions

314 Questions
Sort by:
  • Jim Dobbins
     
    • Bill
      2/18/2012 Bill
      Check switch at upper part of brake pedal
      Bill
      2/18/2012 Jim Dobbins
      can you send me a copy of how to get this out?
      Bill
      2/18/2012 Bill
      Should be just a simple bracket
    • CVO
      2/18/2012 CVO
      Brake Light Switch
      REMOVAL & INSTALLATION

      Disconnect the negative battery cable.
      Disable the SIR system (if equipped).
      Remove the clip (R/V Series) or unclip the switch (C/K Series) and unplug the electrical connector from the brake light switch.
      Remove the switch.
      Installation is the reverse of removal.
  • Bryan
    Bryan - 1995 GMC Sonoma - Brakes - 2/18/2012
    No tailights or brakelights when headlights are on
    I just recently replaced my turn signal switch and had to rewire everything. Now I have no taillights or brake lights when headlights are on. Checked my ground and its getting power. Replaced all bulbs and still having trouble. Help!
     
    • jdl
      2/18/2012 jdl
      The ground shouldn't have power. I can't tell about your rewiring. My thought was a ground issue? The brown wire from the headlamp switch should carry voltage to the tail lamps, when head lamp switch is on. You can bypass the switch by using a jumper between the orange and brown wire. The orange wire is hot all the time.
      jdl
      2/18/2012 jdl
  • gmaster
    gmaster - 1998 GMC Savana 2500 - Brakes - 2/17/2012
    Want to buy 2 rear ac delco brake drums but want to know which ones would fit my vehicle
    My van has 8 lugs with weight load of 8600lbs and 13 x 2-1/2 brakes. can anyone tell me which model to purchase? I at an AC Delco 18B147 but dont know if this would work for me. Can anyone help me? Thanks
     
    • HouseCallAuto
      2/17/2012 HouseCallAuto
      Yes, that part # is correct but ACDELCO also has an upgraded version @ part # 18B147A - the A at the end is for "Advantage" do not know specifically what the advantage is however the drum costs a little more but it's your call, either one is fine and they are both genuine ACDELCO parts. If you look at the inside door jam of your van you will see a decal with a n=bunch of three digit codes. This is a RPO decal Regular Production Options. You will likely see the code JD7 indicating the brake system your van was built with. The two parts numbers fit JD7 brake systems. Just confirm the JD7 on your decal.
  • OIF
    OIF - 2004 GMC Savana 1500 - Brakes - 2/7/2012
    Why does my van breaks bounce/vibrate/shake when I break.
    Have about 39000 miles on this van. I would say this started last summer and has gotten worst since. It fells like I have air in the breaks, but not like air when the pedal goes to the floor, the pedal just kind of bounces, but it stops the van, there is no ...
     
    0 answer
  • leroy smith
    leroy smith - 2002 GMC Yukon Denali - Brakes - 2/5/2012
    My release cable for emergency brake popped, leaving pedal engaged and brake light in dash on also that warning sound on
    Also warning sound is on.what would it cost. Emergency brake cable popped...
     
    0 answer
  • mike
    mike - 1998 GMC K1500 Suburban - Brakes - 2/3/2012
    I'd like a step by step along with some visual aids if possible on replacing my wheel cylinders and rear brakes.
    here's the deal. I just installed a 1977 14 bolt gm rear end on my 98' pickup after some modifications of course. I am not familiar with the full floating axle. A friend told me i have to remove the axlein order to take the drum off. What steps will i need to follow ...
     
    0 answer
  • smarshall
    smarshall - 2002 GMC Yukon Denali XL - Brakes - 2/1/2012
    Brakes pulsate when applied
    When I apply brake it makes a pulsating sound
     
    • Spoon Sports
      2/1/2012 Spoon Sports
      A pulsating brake pedal, which may be accompanied by a shuddering or jerky stop during normal braking, usually means a warped rotor or an out-of-round drum although it can sometimes be caused by loose wheel bearings, a bent axle shaft or loose brake parts. If the vehicle is equipped with ABS, however, some pedal feedback and noise is normal during panic stops or when braking on wet or slick surfaces. But you should not experience any ABS pedal feedback when braking normally on dry pavement.

      The faces of a disc brake rotor must be parallel (within .0005 inch on most cars) and flat (no more than about .002 to .005 inches of runout) otherwise it will kick the brake pads in and out when the brakes are applied, producing a pulsation or vibration that can be felt in the brake pedal as the rotor alternately grabs and slips.

      You can often see warpage in a brake rotor by simply looking at it. If the rotor has telltale glazed or discolored patches on its face, chances are it is warped. Measuring it with a dial indicator and checking it for flatness with a straight edge will confirm the diagnosis.

      Resurfacing the rotor to restore the faces will usually eliminate the pulsation (unless the rotor is bent or is badly worn and has started to collapse in which case the rotor must be replaced). But it may only do so temporarily because of metallurgical changes that take place in the rotor. Hard spots often extend below the surface of the rotor. Resurfacing will restore the surface, but the hard spot may reappear again in a few thousand miles as the rotor wears. For this reason, GM and others recommend replacing warped rotors rather than resurfacing them.

      Pedal pulsation caused by drum warpage isn't as common, but it can happen. A drum can sometimes be warped out-of-round by applying the parking brake when the brakes are hot. As the drum cools, the force of the shoes causes the drum to distort.

      What causes a rotor to warp? Overtorquing or unevenly torquing the lug nuts with an impact wrench is a common cause. For this reason, most experts recommend using a torque wrench to tighten lug nuts when changing a wheel. There are also special torque-limiting extension sockets called "Torque Sticks" that can be safely used with an impact wrench to accurately tighten lug nuts. But a plain impact wrench should never be used for the final tightening of the lug nuts because most provide no control whatsoever over the amount of torque applied to the nuts.

      Overheating can also cause rotors to warp. Overheating may be the result of severe abuse or dragging brakes. Defects in the rotor casting, such as thick and thin areas can also cause uneven cooling that leads to warpage. Hard spots in the metal due to casting impurities can be yet another cause.

  • owatkins44
    owatkins44 - 1995 GMC Jimmy - Brakes - 2/1/2012
    Rear brake drums 1968 gmc 1/2 ton truck
    i have a 1968 gmc c1500 that need rear brake drum the rear drum are difference than the front drum front drum will not fit the rear. the drums on the rear are deeper because the axle stick out a little does any one know where i can the rear drum dealer does not ...
     
    • CVO
      2/1/2012 CVO
      CVO
      2/1/2012 owatkins44
      thanks they dont have a drum will fit that 60 dana
      CVO
      2/2/2012 CVO
      www.rockauto.com

      Go to our Interactive Catalog for more cool features
      Look for a part:
      Find More Parts
      (Contains 0 Items)
      1968 : GMC : C15/C1500 PICKUP
      3.8L 230cid L6
      4.1L 250cid L6
      4.8L 292cid L6
      5.0L 305cid V6
      5.0L 307cid V8
      5.4L 327cid V8
      5.7L 351cid V6
      6.5L 396cid V8
      What's the vehicle engine displacement ?
  • Brandon
     
    • Spoon Sports
      1/17/2012 Spoon Sports

      Your brake pads may need replacing, the disc or drum may be warped or cracked, the caliper may need replacing, especially if there is metal on metal friction.
      Floating caliper (single piston) designs are subject to failure due to sticking which can occur due to dirt or corrosion if the vehicle is not operated regularly. This can cause the pad attached to the caliper to rub on the disc when the brake is released. This can reduce fuel effiency and cause excessive wear on the affected pad. Additional heat generated by the constantly rubbing pad can lead to warping of the disc also.
      Spoon Sports
      1/18/2012 Brandon
      Thank you
    • HouseCallAuto
      1/17/2012 HouseCallAuto
      Remove the self-adjuster / star-wheel adjuster, separate the two halves where it is threaded and put a tiny amount of anti-seize compound on the threads and make sure that there is an "L" stamped into the end of the adjuster when you remove the end cap indicating left side.
      HouseCallAuto
      1/17/2012 HouseCallAuto
      Mske sure that the hole where you adjust the brakes with a spoon has the rubber plug installed in it to prevent road salt from intruding right to the adjuster.
      HouseCallAuto
      1/18/2012 Brandon
      Thank you
  • MIGUEL
    MIGUEL - 2006 GMC Canyon - Brakes - 1/16/2012
    Im wondering why My truck is jumpy while it's on on park gear or on pressing the brake?
    It seems as if the truck feels heavier and as if want to accelerate on it's own
     
    0 answer
  • avecchio
    avecchio - 2000 GMC Sierra 1500 - Brakes - 1/16/2012
    What are Torque specs for front wheel bearing hub assembly & brakes
    Does anyone know where i can download specs for free online
     
  • Dan
    Dan - 2003 GMC Yukon - Brakes - 1/14/2012
    What is a fair price to repair leaky brake line
    Brake pedal went to the floor. I checked the brake fluid and it was low. What is a fair price to repair the leaking brake line
     
    • CVO
      1/14/2012 CVO
      Those two links below are for the repair quotes and negotiations.

      1.Visit this link... http://www.automd.com/repaircost/ , fill in all the data required and get the quotes.

      2.This link, AutoMD will help you to negotiate with the local auto repair shops for a reasonable prices.

      http://www.automd.com/negotiator/
    • HouseCallAuto
      1/14/2012 HouseCallAuto
      The word fair is vague and subjective. Repair costs are tied to the amount of hours or parts of an hour times the shop hourly labor rate. A typical rate is $80 an hour plus parts needed. A 3 hour repair is $240 plus parts.
  • bgfoote
    bgfoote - 2006 GMC Sierra 1500 - Brakes - 1/9/2012
    Front brakes are hannging up
    i have replaced bouth hubs and rotors and, wheel sesoprs, calipers, and pads. there are no codes and blead the brake system
     
    • don
      1/9/2012 don
      sounds like your power booster in starting to go out . try to pull up on the brake pedal see if your brakes release???? if so write back and tell me..............
      don
      1/9/2012 bgfoote
      ok i will try that and let you know the out come thanks don
      don
      1/15/2012 bgfoote
      ok well i did that and still have the problem....
  • Vinny
    Vinny - 2001 GMC Yukon - Brakes - 1/8/2012
    2001 Yukon SLT,5.3L is limited slip axle or non limited slip axle?
    I'm about to get front and rear brake disc,but I was told to make sure if my car is with limited slip axle/differential or non limited axle/differential
     
    • Jay Giron
      1/8/2012 Jay Giron
      A limited slip differential (the gears in the rear end, not the transmission) has clutches that distribute power evenly to both wheels, limiting the amout of wheel spin.

      An open differntial (non- limited slip) has fewer moving parts. It sends power the the wheel with the least resistance. As long as you don't spin your tires, (drag racing, snow, mud) an open differential is perfectly functional and less prone to noise and failure in the long run.