What operates fuel gauge in 2001 Oldsmobile Alero?

In a 2001 Oldsmobile Alero, the fuel gauge is operated by a float mechanism located in the fuel tank. As the fuel level changes, the float moves up or down, which adjusts a variable resistor (also known as a fuel level sensor) that sends a corresponding signal to the gauge on the dashboard. This electrical signal is then converted into a visual display, indicating the amount of fuel remaining in the tank. If the gauge is malfunctioning, it could be due to a faulty sensor, wiring issues, or a problem with the gauge itself.