Q: Brake System on 1995 Chevrolet Suburban 1500

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During wet/snow condtions the ABS does not operation properly. When breaking under these conditions the brakes do not engage properly, there is a shutter feeling in the steering wheel and brake pedal and very odd noise from the front end. The truck does not slow/stop like it should. My guess is that the ABS module is defective but I'm not sure.

Thank you for your assistance.
(1) Answer
(1) Comments
I believe what you are describing is the ABS system working. The ABS prevents the wheels from locking up and it's done by controlling the brake pressure. The shudder noise you feel is the ABS modulator operating, the odd noise is the modulator itself working, and as with any ABS vehicle as long as the tires are spinning, that means that there is traction (not necessarily on ice). The vehicle will actually stop in a shorter distance with ABS working keeping the tires rotating than skidding tires without ABS.
After several driving cycles maybe about nine or 10 the ABS light will come on throughout the driving cycle Once I stop the engine( turn it off) for at least two minutes ABS light doesn't return until about another 10 driving cycle.
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