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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Displays And Gauges >> Diagnostic Information and Procedures >> Speedometer and/or Odometer Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Verify no DTC is set.
    • Go to next step: If no DTCs are set 
  2. Ignition ON, perform the Speedometer Sweep Test with the scan tool, verify the speedometer sweeps from low to high position.
    • If speedometer does not sweep 

      Replace the instrument panel cluster (IPC).

    • Go to next step: If speedometer sweeps properly 
  3. Drive the vehicle, verify the speedometer gauge value matches the Vehicle Speed parameter on the scan tool.
    • If the values do not match 

      Replace the instrument panel cluster (IPC).

    • Go to next step: If the speedometer value matches the scan tool parameter 
  4. Drive the vehicle, verify the odometer display and the displayed distance counts up while driving.
    • If the odometer displays only "ERROR" 
    1. Reprogram the instrument panel cluster (IPC).
    2. Verify odometer does not display "ERROR"
      • If odometer displays "ERROR", replace the instrument panel cluster (IPC).
    • If the odometer display does not count up 

      Replace the instrument panel cluster (IPC).

    • Go to next step: If speedometer sweeps and displays the correct value, and the odometer display counts up 
  5. All OK.
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