I cleaned up the corrosion on the fuse box, and reassembled it. Put it back in the truck and still nothing. No crank, no square around PRNDL. no gauges working, and the outdoor temp gauge still says 130degrees. I think maybe the FCM is partially dead.

 

Is there supposed to be wire traces where mine is corroded away in that one spot?

 

FCM cured my temp issue as well as interior lights. But still no start no prndl. Even though yours doesn't even crank im thinking we both are having the same issues. Im redoing all my grounds. I hate those metal eyelets that the wires are just crimped in and no solder. One by the battery will be the worst as the wiring is just long enough to go there. After that if its still messing up which im sure it will im pulling the engine wiring out behind the trans. Im thinking there is a wire shorted or rubbed through behind there. As I looked up under the truck the wire loom sits on the edge of the trans with no holder to it sits there and rocks up and down all the time. Its cold here now and no heat in the garage so I might be a couple of days lol.

 

I replaced the TIPM/Fuse box and now all is well. The only issue is that only the ABS light is flashing constantly. Truck is at the stealership getting reprogrammed/updated. Hopefully that cures the issues.

 

Mine, dont crank and i have all gear with a square on each level.