By using the service of course.

This morning on my commute to work I took my finger and touched it to that blue button. That brand new blue button mounted to the roof of my car.

Immediately a screen prompt came on to tell me that it was “connecting me”. After 30 seconds of connecting me, Onstar hung up on me. So I tried again and received the same thing. I thought, “that’s odd”. The first time I’m trying to use it and the service doesn’t work. I assume they were busy due to commuting call rush and I’d try again later.

At lunch, I went to my car and pressed again. Same thing.

This made me much happier about my expense! It doesn’t even work!

I googled for the cancellation number. 1.888.466.7827. Hint (don’t type 1.866 accidentally because it’s naughty). After 5 minutes on the phone, I was connected with someone. 10 minutes going through a question and answer and the service was canceled.