Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2019EXPRESS 2500 BASE, VAN CARGO EXTENDED, 6.0L ENG VIN GREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 20 (ENGINE CONTROLS AND FUEL - 2.8L (LWN) DIESEL - DIAGNOSTIC INFORMATION AND PROCEDURES (3 OF 3))DIAGNOSTIC INFORMATION AND PROCEDURESINSPECTION/MAINTENANCE SYSTEM CHECKCIRCUIT/SYSTEM TESTING

2019 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN G

Circuit/System Testing

2019 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN GSECTION Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.

NOTE:

Many DTC related repairs will instruct the technician to clear the DTC information. Clearing the DTC will reset the Inspection/Maintenance System Status or Data indicators to NO. Performing the I/M Complete System Set Procedure will set each of the I/M System Status indicators to YES.

Verify no I/M DTCs are present.
- If an I/M DTC is set that would prevent the I/M System Status tests from completing, diagnose that DTC before continuing.
  Refer to Inspection/Maintenance (I/M) System DTC Table .
- Go to next step: If no I/M DTCs are set
Review applicable service bulletins for software updates that would prevent the I/M System Status tests from completing.
- If a control module re-program or other repair is required,
  Perform the Inspection/Maintenance Complete System Set Procedure after repair.
- Go to next step: If no repair is required
Observe the Inspection/Maintenance System Status or Data indicators.
- If any Inspection/Maintenance System Status or Data indicators report NO
  Perform the Inspection/Maintenance Complete System Set Procedure .
- Go to next step: If no Inspection/Maintenance System Status or Data indicators report NO
All OK.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.