When you buy OnStar FMV for "For My Vehicle" (now available to everyone, not just drivers of General Motors cars), you literally get a new rearview mirror. But that mirror can do a lot more than just show you what's behind you.
OnStar FMV ($375 installed, plus $600 for two years of service), provides you with automatic 911 notification in the event of a crash and help locating your car if it's ever stolen. Side benefit: services such as restaurant reservations and basic turn-by-turn directions.
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