Car crash detection. It matters. In the moment of a crash, a fast response is everything. It’s why we created OnStar Automatic Crash Response.* Using built-in vehicle sensors, a specially trained OnStar Advisor can be immediately connected into your car to offer help. Even if you don’t respond, our Advisors can give First Responders your location and use Injury Severity Prediction to tell them the likelihood of serious injuries. OnStar Advisors are also trained and certified* to provide medical assistance until help arrives, ensuring you won’t face the emergency alone. Simply put, OnStar crash detection can save lives.