I have a 2019 Z71 Crew cab…
I have a 2019 Z71 Crew cab Chevrolet Silverado with a 8 speed Transmission and it started shifting rough and doing the transmission flutter. I took it to the dealer at Union City, Tennessee, Herman Jenkins and They put it on the computer and drove it and the technician felt like I called it in time and said that he thought the transmission flush would fix it so I agreed took him about two hours to do it as as they finished Amy told me to give it 200 miles before I noticed a difference , but I noticed it right away within one or 2 miles it’s been shifting perfect ever since so I plan on doing this again around 45,000 miles. hopefully this helps just service you’re transmission like you’re supposed to Maybe you won’t have any issues.