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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 113 (Engine Controls And Fuel - 4.3L (LV1) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> Inspection/Maintenance System Check >> 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
    NOTE: Many DTC related repairs will instruct the technician to clear the DTC information. Clearing the DTC will reset the I/M System Status monitors to Incomplete. Performing the I/M Complete System Set Procedure will set each of the I/M System Status monitors to Complete.
  2. Verify there are no Permanent DTCs set - Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
    • If a Permanent DTC is set 
      1. Operate the vehicle within the Conditions for Running the DTC. - For each Permanent DTC set.
      2. Verify the DTC does not set.
      3. Refer to step 3 
    • If a Permanent DTC is not set 
      NOTE: The parameters listed below are located in the following scan tool data list: Inspection/Maintenance System Status Data
  3. Verify the scan tool parameter:
    • Boost System Monitor - Since Diagnostic Trouble Codes Cleared
    • Catalytic Converter Monitor - Since Diagnostic Trouble Codes Cleared = Complete or Not Supported
    • Evaporative Emission Monitor - Since Diagnostic Trouble Codes Cleared = Complete or Not Supported
    • Exhaust Aftertreatment Monitor - Since Diagnostic Trouble Codes Cleared
    • Exhaust Gas Recirculation Valve/Camshaft Position Monitor - Since Diagnostic Trouble Codes Cleared = Complete or Not Supported
    • Exhaust Gas Sensor Monitor - Since Diagnostic Trouble Codes Cleared
    • Fuel System Monitor - Since Diagnostic Trouble Codes Cleared = Complete or Not Supported
    • Oxygen Sensor/Heated Oxygen Sensor Monitor - Since Diagnostic Trouble Codes Cleared = Complete or Not Supported
    • Oxygen Sensor Heater Monitor - Since Diagnostic Trouble Codes Cleared = Complete or Not Supported
    • Particulate Filter Monitor - Since Diagnostic Trouble Codes Cleared = Complete or Not Supported
  4. All OK.
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