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Home >> GMC >> 2002 >> C3500 HD 6.5 F, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel, Gages, And Console >> Description and Operation >> Instrument Panel Cluster (IPC) Description and Operation >> Fuel Gage >> Single Tank (8.1L)

Single Tank (8.1L)

The fuel level is displayed in the IPC, based on the information from the fuel level sensor signal circuit. The fuel level sensor changes resistance (40-250 ohms) based on the fuel level. When the fuel tank is full the fuel level sensor resistance is high. When the fuel tank is empty the fuel level sensor resistance is low. The PCM monitors the signal circuit of the fuel level sensor in order to determine the fuel level. The PCM calculates the total remaining fuel percentage in the fuel tank based on the fuel level sensor resistance and the PCM 5 volt reference. The IPC receives the total amount of fuel remaining information from the PCM via the fuel level sensor signal circuit.

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