Question about Chevrolet Blazer

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I have a 2001 Chevy Blazer and when driving at anything over 30-40 mph it is really loud,like a deep resonating noise. The problem gets worse at higher speeds and is even creeping in at lower speeds now. What could this be?

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  • Mark Brayshaw Mar 16, 2011

    Hey, it actually does seem to quieten down when turning to the left, dont know if that would indicate which bearing it would be?

    I wont be doing the work myself but there are very few mechanics here that know about Blazers so any instructions how to do the bearings would be most helpful.

    Thank you

  • Mark Brayshaw Mar 16, 2011

    Thank you, very helpful, now i can get this irritation fixed

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  • Chevrolet Master
  • 8,266 Answers

Hi, this is usually caused by a failed wheel bearing. If it quiets when turning one direction or the other, it is a front wheel bearing. Now that it's really bad, you may be able to tell which one it is by removing the front wheels and checking for play of the axles inside the hubs. Please let me know if you would like instructions for replacing the bearing or if you have other questions, and thanks for using FixYa.

Posted on Mar 16, 2011

  • Jeff Turcotte
    Jeff Turcotte Mar 16, 2011

    Here are full instructions for replacing the bearing. These are taken from Autozone.com. Any mechanic in any country should be able to do this, as these designs are fairly similar among brands.



    Removal & Installation




    1. Before servicing the vehicle, refer to the Precautions section.

    2. On 4WD vehicles, remove wheel center cap, if equipped, and the drive axle nut and washer

    3. Raise and support the vehicle.

    4. Remove or disconnect the following:


      NOTE

      Lay the hub and bearing on the wheel studs on the outboard side. This will avoid damaging the bearing seal.





      Tire and wheel

      Caliper, leaving the fluid lines connected

      Brake rotor

      Halfshaft from the hub and bearing on 4WD vehicles. Place a brass drift against the outer edge of the halfshaft to protect the shaft threads. Use a hammer to sharply strike the brass drift, but to do not remove the halfshaft at this time.

      Wheel speed sensor

      Wheel hub and bearing-to-steering knuckle bolts and hub and bearing


      Splash shield from the steering knuckle

      Seal from the hub and bearing


    To install:



    1. Install or connect the following:



      Wheel hub and bearing seal

      Splash shield to the steering knuckle, making sure it-s properly aligned

      Hub and bearing to the steering knuckle, aligning the threaded holes

      Hub and bearing bolts and tighten to 77 ft. lbs. (105 Nm)

      Wheel speed sensor. Tighten the bolt to 13 ft. lbs. (18 Nm).

      Rotor and brake caliper

      Tire and wheel



    2. Lower the vehicle

    3. On 4WD vehicles, install the drive axle nut and tighten to 103 ft. lbs. (140 Nm), then install the center cap.

  • Jeff Turcotte
    Jeff Turcotte Mar 16, 2011

    quiet turning left usually indicates the left front bearing is worn out, but do check both sides for play in the axle.

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