Question about 1997 GMC Sierra K2500

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Anti-lock brakes come on just before I stop.

I recently changed the master cylinder, rotors, calipers,pads, wheel cylinders and shoes on my 1997 GMC Suburban K2500. Now that I have everything back together the pedal gives way just before stopping and you can here the anti-lock brakes engage. I do not have a sensor light coming on in the dash. I have checked the front sensors in the hub to make sure I have them installed properly. The only other part that is not new is the ABS Module. When I unplug the abs fuse the problem goes away? What should I do?

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  • tmcanally Mar 05, 2009

    Yes, I have even taken it to a qualified shop to verify that.

  • tmcanally Mar 09, 2009

    As far as I can tell. Any thought to my problem?

  • Dennis Mulford
    Dennis Mulford May 11, 2010

    did you get the system completly bleed out?

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It might be a ALB sensor. Did you check to see if the sensor is operational? Its the cheapest place to check.

Posted on Mar 17, 2009

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I need to know how to change the front brakes on a 94 jeep grand cherokee laredo.


  1. Raise and support the vehicle safely using jackstands. Remove the wheel(s) on the side to be worked on.

NOTE: Removing a small amount of brake fluid from the master cylinder using a turkey baster


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Fig. 4: Tighten the C-clamp until the piston reaches the bottom of its bore


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Fig. 5: Remove the caliper mounting bolts


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Fig. 6: Slide the caliper off the brake rotor

  1. Drain a small amount of the brake fluid from the front reservoir using a suction gun or a turkey baster.
  2. Place a C-clamp on the caliper so that the solid end contacts the back of the caliper and the screw end contacts the metal part of the outboard brake pad.
  3. Tighten the clamp until the caliper moves far enough to force the piston to the bottom of the piston bore. This will back the brake pads off of the rotor surface to facilitate the removal and installation of the caliper assembly
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Fig. 7: Support the caliper so that no tension is placed on the brake hose


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Fig. 8: Hold the anti-rattle clip while removing the outboard pad (4)


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Fig. 9: Removing the outboard brake pad


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Fig. 10: Remove the inboard pad and anti-rattle clip


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Fig. 11: Removing the inboard brake pad


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Fig. 12: Removing the anti-rattle clip

  1. Remove the C-clamp.
Do not push down on the brake pedal or the piston and brake pads will return to their original positions up against the rotor.
  1. Remove the caliper mounting bolts. Tilt the top of the caliper outward and lift it off the rotor.
  2. Hold the anti-rattle clip against the caliper anchor plate and remove the outboard brake pad.
  3. Remove the inboard pad and the anti-rattle clip. Be sure that the support spring is removed with the inboard pad.
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Fig. 13: Install the support spring onto the shoe of the inboard brake pad


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Fig. 14: Installing the inboard pad


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Fig. 15: Piston extension on new and worn brake pads

  1. Use a piece of wire to support the caliper so that no tension is placed on the brake hose. Do not allow the caliper to hang by the brake hose.
To install:
  1. Clean all the mounting holes and bushing grooves in the caliper ears. Clean the mounting bolts. Replace the bolts if they are corroded or if the threads are damaged. Wipe the inside of the caliper clean, including the exterior of the dust boot. Inspect the dust boot for cuts or cracks and for proper seating in the piston bore. If evidence of fluid leakage is noted, the caliper should be rebuilt.
Do not use abrasives on the bolts in order not to destroy their protective plating. You should not use compressed air to clean the inside of the caliper, as it may unseat the dust boot seal.
  1. If not already in place, attach the support spring to the inboard brake pad.
  2. Install the anti-rattle clip on the trailing end of the inboard pad's anchor plate. The split end of the clip must face away from the rotor.
  3. Install the inboard pad in the caliper. The pad must lay flat against the piston.
  4. Install the outboard pad in the caliper while holding the anti-rattle clip.
  5. With the pads installed, position the caliper over the rotor.
Before securing the caliper, ensure the brake hose is not twisted, kinked or touching any chassis parts.
  1. Lubricate the caliper pins and bushings with silicone grease. Line up the mounting holes in the caliper and the support bracket and insert the mounting bolts. Make sure that the bolts pass under the retaining ears on the inboard shoes. Push the bolts through until they engage the holes of the outboard pad and caliper ears. Thread the bolts into the support bracket and tighten them to 7-15 ft. lbs. (9-20 Nm).
CAUTION On models with manual/power brakes, pump the pedal until the caliper pistons and brake shoes are seated. On models with anti-lock brakes, turn the ignition ON and allow the booster pump to build pressure. Pump the brake pedal until the shoes are seated and the indicator lights turn off.
  1. Fill the master cylinder with brake fluid and pump the brake pedal to seat the pads.
  2. Install the wheel assembly and lower the vehicle. Check the level of the brake fluid in the master cylinder and fill as necessary.

Remember to rate this, good luck.

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Front caliper mounting bracket 93086g95.gif

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Caliper bracket sleeves 93086g97.gif

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Rear brake caliper 93086g96.gif

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