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Thread: Squeaking Upper Control Arm Bushings

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  1. #1
    Junior Member

    Currently Offline
    9 Posts Since Mar 2012
    Homestead, FL.
    2003 Chevy TrailBlazer
    LT 4.2L I6 2WD
    Dark Green Metallic

    Squeaking Upper Control Arm Bushings

    At 185k miles I changed out the shocks and upper control arm bushings. The new upper control arm bushings are now making a squeaking noise when I brake. Did I do something wrong or are they defective or is this temporary? BTW the upper control arm bushings are Moog.

  2. #2
    Premium Supporter

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    3,426 Posts Since Dec 2011
    Mansfield, OH
    2002 Chevy TrailBlazer
    LS 4.2L I6 4X4
    Forest Green Metallic
    Sure it is the upper bushings? When you replaced the shocks did you replace the upper mounts on the front also?

  3. #3
    Senior Member

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    331 Posts Since Jan 2012
    Decatur, MI
    2002 GMC Envoy XL
    SLT 4.2L I6 4X4
    Sandalwood Metallic
    Also when you tighten those two bolts on the UCA, it would of helped if you loaded the arm first with the jack then tighten the two bolts. The squeaking will eventually go away after break in I believe.

  4. #4
    Junior Member

    Currently Offline
    9 Posts Since Mar 2012
    Homestead, FL.
    2003 Chevy TrailBlazer
    LT 4.2L I6 2WD
    Dark Green Metallic
    Sparky
    Sure it is the upper bushings? When you replaced the shocks did you replace the upper mounts on the front also?
    Yes. I bought two new shock mounts when replacing the shocks.

    seanpooh
    Also when you tighten those two bolts on the UCA, it would of helped if you loaded the arm first with the jack then tighten the two bolts. The squeaking will eventually go away after break in I believe.
    I didn't try loading the arm with a jack when I tightened the bolts. I might loosen the bolts and load the arm first with the jack and re-tighten the bolts. They don't squeak on every bump, only when I brake or when the front dips more than usual.
    02BlueGMCenvoy likes this.

  5. #5
    Premium Supporter

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    3,426 Posts Since Dec 2011
    Mansfield, OH
    2002 Chevy TrailBlazer
    LS 4.2L I6 4X4
    Forest Green Metallic
    OK the upper mounts sometimes can be the cause of squeaks if they are worn which is why I asked.

    I would try retightening the bolts with the suspension loaded. It is always a good idea to do that with suspension parts so that the bushings are in the most neutral position when the vehicle is on its wheels instead of preloaded. They'll also last longer. So give that a shot and let us know if the squeak goes away

 

 

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