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What year is your truck?

You may be able to clean it up and resolder any bad connections. Its worth a try. I believe the Allison dealer can reprogram the correct part number to work on your truck. Or you can find a mil replacement that came out of the same series truck.

The 3116 is all mechanical and will start with air fuel and power. You can jump the starter solenoid with a screwdriver without tilting the cab. The trans selector is a different story and you wont go anywhere unless its functioning. There is a vim module in the passenger side underdash with 6...

There are little plastic tabs that hold the wires with basically spade connectors in place in the power panel. It's spaghetti in there.

Check all the grounds. There are 2 connectors on the back of the wtec computer. Which is right behind the selector. They seem to have a habit of backing out a bit. I was changing my light switch and mine came right off.