Hi Carnell. Please be more descriptive when you say the fuel level indicator is not working. Is it stuck on full, stuck on empty, jumping all over, going up to full when below half a tank, etc? Describe exactly what it does.
If it is stuck on empty the float in the tank that tells the indicator how much gas is in the tank could be stuck on something in the tank. If it is moving but giving incorrect readings, you probably have to replace the level sensor on the fuel pump.