NWS405

Hello... 2018 GMC Sierra 5.3L engine. Today, while out on an appt, received an incoming phone call on the cab entertainment console. Knowing it was scam number, I cancelled the call but then a strange alarm came thru at the same time that did not resolve. The alarm would not subside. I cut the engine and removed my key but the alarm continued. Closed my door but still continued. I then attempted to power off the console but now the sound system was frozen. The alarm finally stopped but the radio was still frozen. A couple more attempts to power the console off/on still had a frozen display. I did get my preset stations but you could not navigate to any stations. No sound to speakers. I then took my truck to my GMC dealer where I then setup for an appt in a week. Upon leaving the store, I started my truck and now the entertainment console was working just fine. Placed a phone call with no problems. Might GM be aware of this problem? The service agent stated that the system may need a hard reset but that they could not handle today hence my appt. [email protected]