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2001 Chevrolet Silverado 2500 HD Question: ABS light stays on

 

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Haroldg, 8.1L V8, Prineville, OR, December 05, 2010, 09:00
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My abs light stays on all the time. I had it checked for a code and it showed that there is no signal from the speed sensor on the drivers side. I replaced the speed sensor and it did not cure the problem. I took off the control module and sent it in for repair but there was no problems with the module. I checked for open wires from the speed sensor to the control module with no problems. Could there be a bad computer problem?

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  • Answer #1

    December 05, 2010, 23:00
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     Master

    Did you check for any issue with the sensor indicator ring on that left front?

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    Haroldg, December 08, 2010, 08:36
     Rookie

    Is the sensor indicator ring in the bearing hub? I looked down the hole where the speed sensor goes and I slowly rotated the hub to see if there was any dirt or grim and it looked clean all the way around of the ring. I did replace the bearing hub about 3 months ago, It was a after market hub from china, I was told by the company that checked the control module that they have heard problems from these after market parts. The speed sensor that I installed was also an after market component, I took off the after market speed sensor and compared it to the original gm part and I noticed that the gm part was 1/8 inch longer than the after market part(the part of the sensor that goes into the hole of the hub) could that be the problem why I am not getting any voltage to the control module. Thank you, Harold

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    DaveJHM, December 08, 2010, 19:35
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     Master

    Yes yes yes.

    The difference in distance between the sensor and the ring based on how it's built is all the difference you need to cause your problem. 100% have seen this in the past. It's variables like these that always cause the problems...and solve them.

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