Suburban Windshield wipers wont stop

Hey there fellas. I'm new here and was just nosing around.  If you are still having the wiper problem...it might be the circuit board on the wiper motor. I used to work at a Champion Autoparts store and we would see this almost daily during the winter and anytime it rained.  GM with their quality parts 

Anywhoo, if you pop the plastic cover off of your wiper motor you should see a circuit board (probably covered in grease) with a socket for the electrical connection to the motor.  That board is what was the culprit 99% of the time. Replace it and you should be good to go.

I'd go to the local parts store and see if they can get them for you. We had to get them from a ACDelco dist. in town, the aftermarket should have picked up on this trend by now so it should be relatively easy to get.

Hope this helps