Hey guys I got the same problem with my 2016 1/2 ton Chevy LTZ with almost 60.000 miles on her.But I had the problem with the transmission shifting from 1st to 2nd and I was thinking it was the 6.2 tight,wrongful thinking.But later on it got to shuddering bad.Took it in they changed the transmission fluid .Did good for a while then the shudder can back.It only does it when it wants to.Took it to the dealer they said if it is not doing it when they test drive it,they can not do anything for me.So today I drove it 45 miles and it did it the hold time .And this is the 8 speed transmission,and I’m am told at the dealership that some of the 10 speed does it too.So I,m in NC and I file a complaint with bbb and let’s see what gm will do.They need to replace my truck or buy me out,had enough.