2019 Silverado custom

[Donnytabor12]

HELP!!!! 
I have a 2019 Silverado custom I believe the 6l80 transmission.it has hard down shifting then Kinda like limp mode it has no gas power and starts when down shifting then the parking brake,esc,check engine lights and display say service ESC all come on.. this all happens when going into reverse as well as slowing for down shifting. if I turn truck off and open door to kill all power all lights will go off except for check engine light and then will just shift rough some of the time. If I disconnect batt the check engine light will go off and truck will be like new like nothing happened. But eventually everyday it seems it will start over again.. this will happen several time while driving but only when slowing and going into a downshift. Also it seems if I have to hard break it’s almost instantly goes into limp mode I am guessing cuz it’s downshifting faster? First time I have ever ran into this kind of problem. Also idk if it matters by my OIL cooler “not the trans line”line blew out not long ago and obviously oil went everywhere.

Edited April 16, 2025 by Donnytabor12
Info

[silveradosid]

if you havn't already check the ground strap behind the right front wheel liner

[jotr]

Sounds to me the transmission my be going out, from what I gathered here and the FB groups its a common issue.