Question about 2002 Pontiac Grand Am

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Service vehicle soon just replaced left front wheel hub assembly, the service vehicle soon, abs & trac off lights were all on. Computer said that was the problem. Fixed it, along with oil change. Now 1.5 days later "service vehicle soon" is back on again.

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  • yadayada
    yadayada Jun 05, 2010

    did you rest the light by the procedure in the owners manual?

  • dockw Jun 05, 2010

    Not that I know of. I don't have an owner's manual for this vehicle. I took it to the dealership I bought the car from for the front hub replacement.

    I even took it back there this morning.

  • yadayada
    yadayada Jun 05, 2010

    please clarify what light is on exactly? oil life?

  • dockw Jun 05, 2010

    Hi--thank you for your advice so far. The light that is on says "Service Vehicle Soon". It is NOT the "Service Engine Soon". No "Oil Life" light is on, the oil was just changed at 4000 miles...a little bit over, but not too bad.

    I still do not understand what you mean by "rest the light."

    The tech at the dealership, turned the vehicle off, and waited a few seconds. Pumped the gas, after turning the key to get all the lights to come on without turning the engine over. He said that should have reset it.

    As soon as I put it in gear to drive away--it "Service Vehicle Soon" came back on again.

    Any advice??

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If you replaced the rotors you may have the wrong rotors, or you may have dirty wheel sensors, it is easy to clean them with a tooth brush and brake clean, try this first. The reason is metal brake dust can collect on the sensor and stop the sensor from producing the 2.5 volts DC as it turns, this would be seen as a fault by the computer as a wheel not turning as fast as the rest of the wheels. Hope this helps if you need more information please let me know. And thanks for using fix-ya.

Posted on Jun 05, 2010

  • dockw Jun 05, 2010

    um, the only light on is "service vehicle soon" the other lights went out with the repair of the front wheel hub. and it happened 1.5 days after the repair, during which time I drove errands all around town--thus my confusion. the diagnostic machine showed there were problems with the front wheel hub. so that's what they fixed.

  • Bruce Hathcock Jun 06, 2010

    this could be as simple as a dirty air filter you need to take it back to the dealer and get it fixed at no cost to you.

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my 2005 was having the same problem with the trac off and speedometer going crazy,replace the front hub assembly problem solved,its usualy the bearings that go bad,so have them check & if replace calibrate them cause if you dont problems come back soon.

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Left front wheel bearing replacement diagram


Removal & Installation Front To Remove:
The front wheel bearings are not serviced separately. If the front wheel bearings are defective, the hub and bearing assembly must be replaced.
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Lubricate the threads on the halfshaft with clean engine oil.
  3. Remove or disconnect the following:
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To Install:
Exploded view of the front hub mounting and related components 7922xg36.gif

  1. Install or connect the following:
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Sounds exactly like the problem I had on my 2003 grand am. I can almost guarantee you have a bad wheel bearing. The change in pressure on the bearing from turning causes the noise to change. The wheel speed sensor is also integrated into the wheel bearing hub assembly which is sending the signal to turn on your brake light.
I would change both front hub assemblies. Ran around $300 for me to do both and put them on myself. Its a very simple job to do yourself if you have the right tools. Make sure you have a "pulley puller" to pull the hub assembly off the CV shaft. You should be able to rent one from a local parts store like Autozone if you don't know someone that already has one.

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