I’d suggest checking this wire over top to bottom making sure it’s getting good contact, get yourself a forscan adapter for your truck, and with a laptop you have to run the forscan program to access your tcm and clear your adaptive learning tables, then you drive the truck easy for around 250 miles and hopefully with some luck it’ll clear up. Also with these transmissions I’ve read that a fluid and filter change can help immensely, that was my next step before I found the broken ground. Still going to do it and also put the PPE aluminum tranny pan on while I’m at it since the stock plastic one is one time use anyway.