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 13 (ENGINE CONTROLS AND FUEL - 2.8L (LWN) DIESEL - DIAGNOSTIC INFORMATION AND PROCEDURES (2 OF 3))DIAGNOSTIC INFORMATION AND PROCEDURESDTC P1307-P130ACIRCUIT/SYSTEM VERIFICATION
2019 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN G
Circuit/System Verification
2019 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN GSECTION Circuit/System Verification
WARNING: This page is about a different variant/trim than selected.
- Ignition ON.
- Verify DTC P037E, P037F, P066A-P066F, P0671 - P0674, P067A, or P067B is not set.
- If DTC P037E, P037F, P066A-P066F, P0671 - P0674, P067A, or P067B is set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If a DTC P037E, P037F, P066A-P066F, P0671 - P0674, P067A, or P067B is not set
- If DTC P037E, P037F, P066A-P066F, P0671 - P0674, P067A, or P067B is set
- Ignition ON.
- Using a scan tool observe the following parameters.
Verify that NO parameters display Malfunction.
- Cylinder 1, 2, 3, or 4 Glow Plug Control Open Test Status
- Cylinder 1, 2, 3, or 4 Glow Plug Control High Voltage Test Status
- Cylinder 1, 2, 3, or 4 Glow Plug Control Low Voltage Test Status
- If Malfunction is displayed
Refer to Circuit/System Testing.
- Go to next step: If Malfunction is not displayed
- Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not set. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
- If a DTC sets
Refer to Circuit/System Testing.
- Go to next step: If a DTC does not set
- If a DTC sets
- 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.