How does a 1986 Chevy trucks dual fuel tanks work?

The 1986 Chevy trucks equipped with dual fuel tanks operate using a switch that allows the driver to select between the two tanks. Each tank has its own fuel pump and sending unit, which deliver fuel to the engine as needed. The switch typically controls an electrical valve that directs fuel from the selected tank to the engine. This system provides increased fuel capacity and range, allowing for longer trips without frequent refueling.