Question about 2002 Cadillac Escalade

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ABS system engage at low speed usually about within 5 to 10 miles per hour.

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There is either rust build up at the sensor where it bolt to the knuckle creating too much gap or there is a hair line crack in the reluctor ring which means you would have to replace the hub assembly.What you can do is remove the sensor where it connects to the knuckle and clean the surface area real good.and make sure all the rust is gone.Then drive the vehicle and see if it goes away.If not it is more than likely the hub bearing.The best way to tell which wheel it is is to use a scan tool.It will be one of the front wheels but you need to find out which one.What I do at work is drive in the parking lot with the scan tool and watch the speed sensors in the ABS data.When I feel it act up I look to see which sensor is dropping to zero speed and this tells me which wheel is the one causing the problem.Then I know to check for rust or ohm the sensor.If they check out good then I know it is the hub bearing assembly.Hope this helps.Good luck.Let me know if you have any more questions.

Posted on Mar 10, 2011


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