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PostPosted: Thu Apr 04, 2019 10:38 am 
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Year and Trim: 2002 Bonneville SSEi
A few days ago, I noticed my TRAC LOSS light would come on for a few seconds and go off while driving on a smooth road. Then the TRAC OFF and ANTI-LOCK LIGHTS would come on and the DIC would say SERVICE STABILITY SYSTEM. The lights would go off when the car was restarted.
Now I'm starting to get a clunk or thump when making left turns and hitting bumps sometimes.
I'm guessing it's a rapidly disintegrating wheel bearing/hub. There's no other noise or rumbling coming from the bearing. Odd thing is it was changed when I got my inspection last year at the place I bought the car from. I'm guessing he used the cheapest bearing he could find because he had to eat the cost.
Is there really a difference between brands or are they all made in China now?


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PostPosted: Thu Apr 04, 2019 10:47 am 
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Location: Ontario, Canada
Year and Trim: 2000 Bonniville SSEi L67
get the car off the ground and check them for play.
who knows what the mechanic put on the car....warranty?
almost everything has something to do with China. dont buy the cheapest one

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PostPosted: Thu Apr 04, 2019 2:06 pm 
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Year and Trim: 2002 Bonneville SSEi
The guy gets his parts from Advance Auto, so I'm guessing he got the Driveworks (cheapest) one. Pretty much the only choice with stores near me are the "house" brand (Driveworks, Duralast, etc.) Or Moog. At least the Moog has a three year warranty.
Just don't want the thing coming apart on me while I'm driving and losing a wheel. Gonna park it when I get home tonight till I can look at it this weekend.
I have the "knock knock" intermediate shaft issue (next on the "fix it" list after this). Could it be getting so worn that play is causing issues with the steering wheel position sensor??


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PostPosted: Thu Apr 04, 2019 3:30 pm 
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only an expensive scantool will pull body data. go with the moog - they made reliable front end parts for me!!

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PostPosted: Thu Apr 04, 2019 5:42 pm 
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Year and Trim: 2002 Bonneville SSEi
It was quiet on the way to work this morning. On my way home it made a few noises. Best described as a single solid thump noise. Sometimes it will do it hitting a bump, sometimes just turning the steering wheel and (only left). If it wasn't for the TRAC LOSS and SERVICE STABILITY SYSTEM warnings I'd say it's an upper strut bushing.
I'll jack it up tomorrow or Saturday and start pulling on stuff and see what I find.


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PostPosted: Sat Apr 06, 2019 2:13 pm 
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Well I got it on the jack. Wiggled the wheel left to right. Only play and noise is the intermediate shaft play. Wiggle top to bottom, no play. So it isn't a wheel bearing. No movement in the strut so it's not the upper bushing. Take the wheel off and look around. Spindle nut tight. Control arm bushings are cracking but there. Then I see it.
Broken sway bar endlink.
At least I know my wheel isnt gonna fall off.


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PostPosted: Sat Apr 06, 2019 2:21 pm 
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PostPosted: Sat Apr 06, 2019 5:24 pm 
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Wheel bearings/hub don't usually go thump when they wear out.
I think you found that issue with the stabilizer link.
But something else is making the warning lights go off for TRACTION.

I have always been able to tell when the bearings are starting to go when
I have the wheel off the ground. Spinning it, grabbing it at 3 and 9 and
shaking hard. It will get worse and eventually let you know if its the hub.

Hopefully your ABS, traction control pump is not going out.

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PostPosted: Sat Apr 06, 2019 6:05 pm 
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skregal wrote:
Wheel bearings/hub don't usually go thump when they wear out.
I think you found that issue with the stabilizer link.
But something else is making the warning lights go off for TRACTION.

I have always been able to tell when the bearings are starting to go when
I have the wheel off the ground. Spinning it, grabbing it at 3 and 9 and
shaking hard. It will get worse and eventually let you know if its the hub.

Hopefully your ABS, traction control pump is not going out.


I felt the thump could be coming from a binding break caliper, which would have pretty much been the only thing holding the wheel on. I read somewhere that a bad lower control arm can cause ABS warning light issues. With the sway bar link broken, maybe I'm getting more wiggle from bad control arm bushings.
Does having worn break pads cause ABS faults?


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PostPosted: Sat Apr 06, 2019 8:34 pm 
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Worn brake pads or worn control arm bushings won't cause ABS faults.
The ABS faults will be caused by bad hub bearings (screwing up the
magnetic readers that tell the computer the wheel speed) or by
the ABS unit itself. Maybe there is another component involved
but not brake pads or control arm bushings.

_________________
Black 95 SSEi (original owner) 236K miles
Black 05 GXP (some idiot put the first 12K on it)178K miles
Black 04 Tahoe (original owner)288K miles
Black 16 Traverse (original owner)58K miles
Black 15 Lacrosse (some nice lady put first 15K on it)20K miles
Image

"You can have one in any color as long as it's black" - H. Ford


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PostPosted: Sun Apr 07, 2019 10:56 am 
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Year and Trim: 2000 Bonniville SSEi L67
yes I would first check the wiring and plug for that wheel. maybe it got damaged

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2000 SSEi
past rides:
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1992 GTP
1987 Grand Am


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