One problem related to brake antilock wheel speed sensor has been reported for the 1999 Chevrolet Silverado 2500. The most recently reported issues are listed below.
My 1999 chevy truck was recalled for a faulty speed sensor that caused the abs to go off when it shouldn't. I took it in for the repair and they cleaned the sensor. Everything was fine. Two weeks ago the same thing started to happen, you get almost to a stop and you all of the sudden loose all your braking power. I pushed the brake pedal with everything I had and nothing. I probably did even more damage to my brake system by pushing so hard trying to stop. I came within about a half an inch from hitting the person in front of me. The same thing has happened other times luckily not with such close calls. Chevy has informed me that since I have put on 30,000 miles since the recall the will not pay for the repair. They also informed me that had I had all my service and repair work there they would have fixed it again for me. This shows me the recall was not about safety for the people who drive their vehicles it is about their bottom line. Period. I have talked to other people that have had the same problem with their chevy GMC trucks and they didn't even get the recall yet. All it will take is one time for your brakes not to work you roll into and intersection and your whole family gets killed because chevy is too cheap to stand behind or fix their faulty product.