The fuel indicator lamp shows the operator which fuel the vehicle is using. When the fuel indicator lamp is off, the vehicle is operating on CNG. When the fuel indicator lamp is on, the vehicle is operating on gasoline.

The fuel gauge selector switch allows the operator to verify the level of fuel in both the gasoline and the CNG fuel tanks. If the switch is pressed when the vehicle is operating on CNG, the fuel gauge will indicate the amount of fuel in the gasoline tank. If the switch is pressed when the vehicle is operating on gasoline, the gauge will indicate the amount of CNG in the fuel tank. During the fuel level check, the fuel gauge will display the fuel level for about ten seconds. The gauge will then return to its previous position.