How To Replace the C5 Corvette Fuel Sending Unit Don’t get stuck playing a guessing game with the fuel level in your C5 ...

Learn how to use a multimeter to test your fuel gauge sending unit in the next section. These are general steps that might not apply exactly to your car, but it details the general process.

Let's start with how the gauge receives the signal indicating the fuel level. In the tank, a float is connecting to a variable resistor on a sending unit.

Next, install the sending unit into the tank, then clip it onto the fuel pump assembly. After that, check to make sure the float arm travels freely and in its full range of motion.