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Automotive/GMC Sierra ABS & Brake Light

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Expert: - 1/27/2008


Question
I am having an ABS and Brake light illuminate on my 2001 GMC Sierra 2500HD 4X4.  They will both come on at random times and stay on until I turn the truck off.  They always come on at the same time.  The weird thing is sometimes I can go a week without any lights and sometimes they will come on every couple days.  There isn't any difference felt in the brakes and the truck stops just fine.  Please help.

Answer
It would seem that the ABS Sensor is picking up an intermittent fault, and tripping the ABS light. It could be a damaged tooth on the Tone Ring, or a faulty Sensor, and only a physical inspection would turn up a damaged Tone Ring, the other problem would probably require a visit to a Shop, where they should be able to test the Sensors at the Wheels.

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Ben Deutschman

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Questions ONLY related to Chrysler/Plymouth/Dodge Slant-Sixes from 1960-1975. You can ask me about Engine Timing, general specifications, do`s and don`ts, and details such as proper installation of `Spark Plugs` on the 1960-74 `Slant-Sixes.`

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I own and work on a 1960 plymouth, powered by a 'Slant-Six', have also worked on a 1968 'Slant-Six', a 1975, a 1964, and and 1970 'Slant-Six'

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Ben Deutschman
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B.A 'Labor Relations', 'Rutgers University' (Livingston College Campus)

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