Hi. What oil are you using? I have a 2020 5.3 10 speed and have tried 3 different oils so far over 45,000 mi.
M1 EP ,Valvoline Advance and Valvoline EP all 0w20 syn. The m1 made engine tick until the oil had about 3000 mi. on it. The valvoline advanced burned off. And vavoline ep is quiet and doesn't use a drop neither did the the m1. Going back to the m1 for a while to see what happens this time around. Engines are like guns. Different engines like different oils and different guns like different ammo. Good luck.