Question about 2001 GMC Sierra 2500HD

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Pulsating while braking

I am experiencing a pulsating vibration while braking and have noticed that my front driver side wheel is moving left to right. what could cause this i have new ball joints, tie rods, pitman and idler arms but i don't know what could be doing it. also my abs and brake lights are on. The lights are always on but sometime don't come on for awhile

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  • Dave  C
    Dave C May 11, 2010

    The front brake rotors are out of true and should either be machined or replaced. It is best to replace the brake pads when you do this as well.

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The vibration is coming from your rotors. You can either replace them or have them miked to see if they can be turned. For the left to right play you should jack it up and check the lower and uper control arm bushings as they might have osme play in them as well. While you are there u will be able to see if the wheel bearing is loose, you will be bale to fix that when you do the rotors. The brakes lights are from low fluid or faulty Abs sensors that are attached to the front hub, this will be easy to see as the only wires running to the hub right behind the rotors.
Heres hopping that thouse rotors can be turned :)
good luck

Posted on May 16, 2009

  • James Huber
    James Huber May 16, 2009

    The vibration is coming from your rotors. You can either replace them or have them miked to see if they can be turned. For the left to right play you should jack it up and check the lower and uper control arm bushings as they might have osme play in them as well. While you are there u will be able to see if the wheel bearing is loose, you will be bale to fix that when you do the rotors. The brakes lights are from low fluid or faulty Abs sensors that are attached to the front hub, this will be easy to see as the only wires running to the hub right behind the rotors.

    Heres hopping that thouse rotors can be turned :)

    good luck

  • James Huber
    James Huber May 16, 2009

    The vibration is coming from your rotors. You can either replace them or have them miked to see if they can be turned. For the left to right play you should jack it up and check the lower and uper control arm bushings as they might have osme play in them as well. While you are there u will be able to see if the wheel bearing is loose, you will be bale to fix that when you do the rotors. The brakes lights are from low fluid or faulty Abs sensors that are attached to the front hub, this will be easy to see as the only wires running to the hub right behind the rotors.

    Heres hopping that thouse rotors can be turned :)

    good luck

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