Diagnosis: fuel level indication faulty reading.
I ordered the fuel floater for Isuzu Crosswind from online store.
Action taken: to remove the fuel tank.
Drain first the remaining fuel in a clean vessel / container.
Remove the hose connections to the fuel tank.
Unscrew two (2) screws from the fuel tank protection plate.
Unscrew the six (6) screws that secure the fuel tank.
After removing the fuel tank in a safe working area, you can now remove the faulty fuel floater.
Clean and inspection, assemble
Status: fixed and in good working condition