WiFi suddenly stopped working Thursday June 10th

[Mister White]

Last Thursday the WiFi Hotspot in my truck stopped working. When plugged in I can not use any apps, maps, nothing. All I get is this error message “An SSL error has occurred and a secure connection to the server cannot be made”  

phone works fine on any other WiFi, on 5G, LTE. Only when connected to truck WiFi does it do this. Again, just happened. It’s not Apple or Car Play already called them. I can’t find any updates. OnStar says it’s not them. I’m hoping someone might have the answer. I hate the dealers service department!!  Also, I just signed up so if I did any of this wrong just help a brother out. No need to point out what I did wrong in a hateful way.
Mister White,

[2016 Sierra Owner]

Ok take someone else's phone and see if they can connect to the wifi in your truck or at least see it on their device. If they can that means the trucks wifi router is putting out a signal for the device to see. That also means if you still can't connect to a website the wifi router in your truck is not getting the signal it needs to communicate with the internet provider. Either the antenna is broke/disconnected or something else is happening.