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Either the gauge is faulty, there is a broken or shorted wire between the gauge and the sending unit or the sending unit is faulty. Hopefully, it's not the sending unit; That's integrated with the fuel pump module inside the fuel tank and to replace it means replacing the entire fuel pump module. Not a fun chore, and requires the removal of either the fuel tank or the truck box (take your pick, one method is about as much work as the other).

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14y ago

What else can I help you with?