This issue occurs at least once every week or every two weeks. I will be talking on the phone with AC on in the car in park and my car will completely shut off as if I pushed the (pushed to start button). I also have experienced my car shutting off after U used the key-fob to remote start the car. Few minutes after I enter the vehicle the car will shut off shortly after. My car is still under the Cadillac bumper to bumper limited warranty. I would hope the car never shuts off like this while driving on freeway for airbags do not deploy if car shuts off. I will update you guys after Cadillac calls me back with a solution.