as soon as I know, you will know
when connected to the Tech2, I had a laundry list of history codes of all the WSS'* not working. When we went to the live mode, I watched 3 of the WSS'* work fine, while the other was off by a couple miles per hour. It depended on the day, which WSS was going to fail, according to the EBCM.
When I talked to Ed'* guy on the phone, he needed my VIN because according to him, there are 7 different ones available and we had to match the numbers.