How OnStar prepares to save your life

Bryan Anta, OnStar emergency advisor, is trained to provide Emergency Medical Dispatch instructions to assist people in need before first responders arrive, in an April 2014 image. (OnStar/TNS)

On any given day, OnStar advisers must be ready to call a tow truck or provide turn-by-turn directions. Or save a life or deliver a baby. 

Take two years ago. Bryan Anta, 33, answered an OnStar emergency call from a man rushing his pregnant wife to the hospital when the baby started coming.