Is OnStar protecting your vehicle??

For what it's worth seems you like it or you don't - Have had on star for three years now and have been from Atlantic to Pacific twice in that time and into many remote locations. The stuff about no regular cell service then no on-star phone is just not alsways so. The only times we found no phone service were in Great Basin and Chaco canyon. The on star transmitter is much more powerful and therefore more range than a regular cell device. Even if it you can't use phone you still can contact on star for help via satellite. There is no cell service at our cabin in TN mountains but we can still use the on star phone.