With the aid of all who posted the symtoms and repair of the ABS SLOW SPEED ACTIVATION FAULT, I was able remove the ABS front wheel sensor, clean it up just by simply wiping the sensor with a clean cloth, I also put a micro amount of high temperature silicon around the exterior contact surface, removal of the sensor from the wheel hub is time consuming, once the allen bolt is removed from the sensor, you need to use a minimum amount of penetrating oil and a constant back and forth twist and a pulling action to remove. you can use a screw driver gently to help pry the sensor out. There is an O RING that has to ride over the rust at the top of the cylinder, I feel there is no need to spend any money on this particulare fault.

good luck
drive safe

moving this post forward, as I feel more people need tobe thanked for their help in repairs made on the duramax diesel.

THANKS

drive safe