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This is not a fuse. If it were a fuse it would either always or never work. Its something with the shift interlock... usually a bad solenoid. It is activated when the engine is running and not when the engine is off with the key on. If you can get the truck there and have a multimeter I can help you test it. Just let me know. Otherwise at least you have an idea of what it is before buying it. Even if you have to have a shop repair it the bill should be under a couple of hundred bucks. That should help you decide if its worth buying.
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