This year I bought a 2019 Chevy Silverado RST 4 wheel drive 8 speed automatic with 28,699 miles on it. I drive about 5000 miles a year. When the transmission is cold it tends to "slip" looking for a gear or rapidly switch from gear to gear with speeds under 35 miles per hour. After the first mile or so these problems go away and the transmission shifts smoothly. I have no way to check the transmission fluid as this model does not have a dip stick. Any ideas?
You and everybody else. It pays to do a little research before dropping a fat stack on a big ticket item
https://gmauthority.com/blog/2021/01/class-action-gm-eight-speed-transmission-lawsuit-hits-a-snag/
https://pickuptrucktalk.com/2021/01/gm-transmission-lawsuit-the-saga-continues/
There’s a slew of issues with these newer GM trucks. From transmission problems to dropping lifters its a giant mess on GMs part. As far as what to do? It seems to me you’ve already done as much as you can do to try and figure out the problem.
