If you shut off the truck in "D" or "R" and lost all air from your tanks(long loading/unloading) you won't be able to start the truck.Two stars on display and message about "neutral not secured".One. and only thing you can do is- to fill air tanks under your seat.Unscrew drain valve from middle air tank,put adapter and pump the air to 100psi.Maybe you should do it twice 0 to 100 back to 0 and again to100.
There are 2 fuses that are responsible for the iShift gear selector. It’s F68 and F19. If I remember correctly, 19 is fuse 10 and 68 is 30. Check those two. I had this issue and even though my fuses weren’t blown, the truck still didn’t start. I replaced both fuses just to see if it would help, it didn’t at first, but the I left the ignition on for few seconds and saw that it went to neutral on its own. Hopefully it’ll help
