[HardcoreZ28]

Most times I've seen an ABS sensor come on with one of my vehicles it's been a bad wheel speed sensor. Either the sensor goes bad or crud gets inbetween the sensor and the magnetic ring. If you jack the car up and disconnect the pigtail for the sensor on each wheel you can probe a multimeter into that connector. Then spin the wheel and see if your resistance numbers go up and down smoothly. If they do then the sensor is ok. If it stays in one spot or barely moves then you have a bad sensor.