yesterday i took my truck for test drive , it was raining i step on the brake, the rear wheel locks up and i don't feel the abs kick in on the brake padel, no codes or lights come on the dash. i suspect the rear sensor goes bad, but it should light up the abs light if went bad? anyone had the same problem and fixed?

 

The ABS on these trucks suck. Pretty common for that to happen. If the sensor were out, it would have the lights come on.

 

On the 99, the speedo would stop working as well.