I was reading my last issue of OnStar magazine, and found an interesting article on a new test program GM is implementing on some vehicles equipped with OnStar. Apparently, they are voluntarily monitoring the mileage and maintenance requirements of select vehicles, and sending out reminders to owners when they should make their next scheduled maintenance visit. They can also pull diagnostics codes and notify you to visit your dealership for necessary repairs. The method used to select vehicles in this "test" program is not made clear, and apparently there is no option of opting in or out of it either. The only certain way of not being a part of this program is if you purchase a vehicle without OnStar, or by somehow disabling it on your vehicle if you currently have it installed. Note that this program is not necessarily a BAD thing, but it can eventually be used as a tool for GM to find ways of making us (especially DIYers) liable for warranty repairs. Also, if the cellular connection is being used to transfer performance data to GM when we are unaware, I am certain that there is nothing stopping them, or anyone for that matter, of enabling the in-cab microphone without our knowledge or consent.