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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 94 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (3 Of 3)) >> Diagnostic Information and Procedures >> Contaminants-in-Diesel Exhaust Fluid Diagnosis >> Repair Verification

Repair 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. Install any components or connectors that have been removed or replaced during diagnosis.
  2. Perform any adjustment, programming, or setup procedures that are required when a component or module is removed or replaced.
  3. Clear the DTCs.
  4. Ignition Off, all vehicle systems Off, this may take up to 2 minutes.
    5. NOTE:

    The reductant and ambient air temperatures must be greater than -7°C (19°F) before proceeding with this procedure.

  5. Ignition On, command the Reductant System Leak Test On with a scan tool. Allow the pressure to build for at least 2 minutes.
  6. Verify there are no leaks in the system.
    • If a leak is found 

      Repair as necessary

    • Go to next step: If no leaks are found 
  7. If the repair was related to a DTC, duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, to verify the DTC does not set.
    • Go to next step: If a DTC does not set 
  8. All OK.
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