If you're having fuel gauge problems, the issue is likely one of the following:
* Faulty fuel level sensor: This is the most common cause of inaccurate fuel gauge readings.
* Wiring problem: A short or broken wire in the fuel gauge circuit.
* Gauge cluster issue: The gauge itself might be malfunctioning.
* Fuel pump module problems: In rare cases, an issue with the fuel pump module can affect the sensor reading.
You would need to take your truck to a mechanic or an auto parts store for diagnostics to determine the cause of the fuel gauge problem.