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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 1 (Displays And Gauges) >> Diagnostic Information and Procedures >> Fuel Gauge Malfunction >> Circuit/System Verification

Circuit/System Verification

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.
  1. Ignition ON/Vehicle in Service Mode.
  2. Verify the fuel level gauge sweeps when performing the scan tool Instrument Cluster Gauge Sweep control function.
    • If the fuel level gauge does not sweep 

      Replace the P16 Instrument Cluster

    • Go to next step: If the fuel level gauge sweeps 
  3. Verify the low fuel level indicator turns ON and OFF when commanding the scan tool All Indicators control function ON and OFF.
    • If the low fuel level indicator does not turn ON and OFF 

      Replace the P16 Instrument Cluster

    • Go to next step: If the low fuel level indicator turns ON and OFF 
  4. Verify the scan tool Fuel Level Sensor parameter is between 0.5 - 3.5 V and varies with fuel level.
    • If not between 0.5 - 3.5 V or does not vary with fuel level 

      Refer to Circuit/System Testing

    • Go to next step: If between 0.5 - 3.5 V and varies with fuel level 
  5. All OK.
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