While slowing for a red light my vehicle shut off, completely powered off. I had to press the ignition start button to turn it back on. I pulled to the side of the road, then two messages flashed on the dash screen, Service Transmission and Service Brake Assist. I called and scheduled a vehicle service at a local Chevrolet service center. After the service center evaluated my vehicle (in their possession for 72 hours) they stated there were no diagnostic findings and they could not replicate the issue. A vehicle randomly shutting off with no identifiable or repairable issue is a public safety concern.