On [XXX] I was traveling at highway speed south on [XXX] . I was driving my 2023 GM [XXX] The truck had 36,199 miles at the time of the incident. The engine is a 6.2 L EcoTec3 V8. While traveling at highway speed, without any warning, the engine shut down. The shift indicator displayed the vehicle being in neutral. When I tried to shift back into gear, a dashboard display stated