LEMON Manuals: Even more car manuals for everyone
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 >> Speedometer and/or Odometer 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. 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.
scientia non olet · About LEMON Manuals