2004 Chevrolet TrailBlazer Logo
Posted on Sep 05, 2008
Answered by a Fixya Expert

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2003 trailblazer lt 4wheel drive

How to replace front hub bearings

  • auctionjon Feb 26, 2009

    after replacing the driverside outer tie rod end due to excessive wear the trailblazer still makes a growling noise comming from the driverside and there is a little vibration in the steering wheel and gas pedal could the noise be a wheel bearing assy or maybe the tires?

  • Anonymous Mar 29, 2014

    wrench and tires symbol loud noise while driving and seems like your in 4wheel when in two

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  • Expert 59 Answers
  • Posted on Sep 05, 2008
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Joined: Aug 24, 2008
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  1. Remove the tire and wheel center cap.
  2. Remove the drive axle nut.
  3. Raise and support the vehicle. Remove the tire and wheel. .
  4. Remove the brake rotor.
  5. Disengage the wheel drive shaft from the wheel hub and bearing. Place a brass drift against the outer end of the wheel drive shaft in order to protect the wheel drive shaft threads. Sharply strike the brass drift with the hammer. Do not attempt to remove the wheel drive shaft from the wheel hub and bearing at this time.
  6. Remove the wheel hub and bearing from the steering knuckle by removing the three bolts coming in from the back side of the knuckle.
Of course you may have to use a hammer to loosen the bearing from the knuckle.

Good Luck

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Does the vehicle make any noises while driving? If there is a "growling or roaring " noise associated with the vibration, check the right front hub bearing. If there are no noises and only vibration, check the right front upper ball joint and control arm bushings. The Trailblazer's upper ball joint and control arm bushings become worn and cause the tire and wheel assembly to shimmy while driving. The vibration stops when turning left because of weight transfer to the right side which keeps the wheel steady for a moment. Also, check the tire for irregular wear.
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Assuming that you're talking about the front wheel speed sensors...
Your best bet is to replace both from wheel hub/bearing assemblies.

They'll cost about $100-$150 each.
When the wheel speed sensors are setting ABS codes it usually means that the bearings are bad.
When you replace the whole hub assembly, a new sensor is already installed in that hub. If it just the sensor (unlikely that just the front sensors alone are going bad) the sensor itself is usually 3/4 of the price of a new hub anyway.

I’m happy to help further over the phone at https://www.6ya.com/expert/jason_00b31cc8f593773a

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