drive.google.com
Hi everyone just wanted to post my success in updating straight from 34.2 to 40.1 using the file St-na linked here. It estimated 35 minutes but really took 25. It did stay on 19% for a while which had me really nervous but it eventually kept going.
I'll outline my steps as a recap.
1. I quick formatted a 4gb drive to Fat32. Note that if you use a really large drive it may have exFat only and the truck will not recognize it. This happened to me with a 128gb drive i tried first.
2. Unzip contents to root of that drive.
3. Turn truck to Run. I did not start the engine.
4. Insert drive into front USB port. Ensure your phone isn't plugged in running AA or carplay.
5. Accept the update and watch it load. I sat and screwed around on my phone for 25 minutes and was all set
Thanks everyone for your help.