2020 2500HD AT4. Mine has happened 3x and the last time it would not start so I had it towed to the dealer and of course it started once there. The 2nd time I was able to start it in neutral and drove it to the dealer. No codes have been active either time. When it is happening I cant start it with the FOB either and I have tried both FOBs, but since it goes through the whole process except for turning over I assume its not a FOB issue. Also when trying to use the FOB I can hear the fuel pump prime and a couple of other noises from under the hood but again no cranking over. Mechanics have mine now again and hoping to replicate but no luck so far. They wondered if it could be related to the glow plugs or something, but its 90+ here and its only happened in the past couple of months so its been warm. Supposedly my dealer has opened a case with the GM department that deals with issues known & unknown. When they try to give it back this time Im going to discuss options for GM buying it back because if they cant find an issue and it resets before the tow truck gets there its BS. I do have it on video but it shows nothing there are no lights, codes etc. This sucks having a very expensive POS that may strand me at any moment.