on star is not worth the money they charge. My wife and I have been lead to highways that are closed more than a few times. One guy told me that my on star did not work in the area I was in. False. I used it before in the same area, and it worked. I also hit the on star again, and received directions from a more competent person. I am very disappointed in what I thought was a truly global positioning technology. GM will not be my next vehicle.
Poor directions, and all they tell you is that they are working on it. I was left at night on a closed expressway that their so called state of the art gps left me, my wife and our handicapped daughter in a terrible neighborhood at night.