Have a 2000 Blazer 4X4, speedo was intermitent now non-exsistent, oddly enough the cruise control will still work when you set it. Dont believe it to be the speed sensor because thats where the cruise gets its signal from. Had the cluster out but dont see anything wrong and checked as much of the wiring as possible but couldnt find a loose or shorted wire. All the other gauges and warning lights work in the cluster. Also, the ABS and Parking brake lights will come on when they feel like it just driving down the road. Any input on this would be greatly appreciated, thanks

 

You really need a scan tool to diagnose. It is possible that the speedo stepper motor has died. That wouldn't have anything to do with the ABS light though.