I would think that if you would take it back to a GM garage that they could hook up the TECH II and shut them off.
Most people who had them says that they are a POS and a PITA.
Anytime a truck comes along and throws slop all over the windshield while you are driving down the road, the wipers comes on and if the windshield is not wet, it scratches the heck out of it.
When they first came out, a friend of mine who was a plant manager for GM came down to camp one year with them on a new chevy truck and we thought that they were the cats meow. We later learned that after GM was done with that truck, they threw it in the shredder.