Fuel Gauge LPG

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

The liquid propane gas control module monitors the signal of the of the primary fuel level sensor to determine the amount of liquid propane in the tank. The liquid propane gas control module uses this signal in order to calculate the percentage of remaining liquid propane gas in the tank and converts it to a PWM signal sent to the ECM. The ECM sends the fuel level percentage via the serial data to the instrument cluster in order to control the fuel gauge. The secondary fuel level sensor is only used as a input to the liquid propane gas control module to transfer fuel to the primary tank. The primary and secondary fuel level sensors have a resistance value of 40 to 240 Ohms. When the fuel tank is full, the resistance of the sensor should be around 40 Ohms and around 240 Ohms when empty.