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 CARSECTION 28 (ENGINE CONTROLS AND FUEL - 2.8L (LWN) DIESEL - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSCRANKSHAFT POSITION VARIATION LEARNWITH SCAN TOOL
2019 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN G
With Scan Tool
2019 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN GSECTION With Scan Tool
WARNING: This page is about a different car, the 2018 GMC Savana 3500, 2018 GMC Savana 2500, 2018 Chevrolet Express 3500, and 2018 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition - On/Vehicle - In Service Mode
- Verify there are no other DTCs set, except for DTC P0300-P0308, P0315.
- If any other DTCs are set
- Go to next step: If no other DTCs are set
- Select: Module Diagnostics
- Select: Engine Control Module
- Select: Configuration/Reset Functions
- Select: Learn Functions
- Select: Crankshaft Position Variation Learn
- Follow the instructions on the scan tool.
Verify the scan tool procedure was successful.
- If the procedure was not successful and first time here
- Ignition/Vehicle - Off
- Verify the following conditions do not exist:
- B26 Crankshaft Position Sensor & Reluctor Ring - Foreign material passing between the components/Incorrect air gap
- Battery Voltage - Low
- Crankshaft Bearing - Worn
- Crankshaft - Excessive runout/Visible Damage
- Reluctor Ring - Misaligned/Visible Damage
- Signal circuit @ B26 Crankshaft Position Sensor - Electromagnetic Interference
- If a condition exists - Repair or replace as necessary
- If no condition exists - Repeat step 1
- If the procedure was not successful and performed 4 times or less
Repeat step 6
- If the procedure was not successful and performed 5 times
Replace the component: K20 Engine Control Module
- Go to next step: If the procedure was successful
- 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.