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Q: abs problem on 2002 Chevrolet S10

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I have an 2002 s10 zr2 and I have lately had an abs problem with it. when I drive the abs light will go on and off and when im on perfectly dry asphalt the pedal will pulsate like its on ice. There is also an annoying pulsating ticking noise when I hold the brake and the vehicle is in drive. I scanned it with a tech 2 gm scan tool and it said it was a problem with # 3 sensor. any guess would help
(2) Answers
check the #3 sensor, connector and wiring, or you already should know that...after scanning it with a tech 2 scan tool.