2000 Buick Century ABS, check engine and trac off light

In the past couple of days I notice a buzzing noise and the check engine, abs, and no trac lights come on. I still have breaks everything seems normal. The lights seem to go away if the car is off overnight but came back on after driveing for 20 mins or so. It has been wet and slushy where I live so I don't know if a cable or sensor is getting wet( they have come on before in the snow). I read on these forms that there is a defect for 2001 Century's with a similar problem where it is both front Wheel speed harnesses. I was just wondering if this would apply to the 2000 model also and if anybody has had teh same propblem and fixes.