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 MANUALSCHEVROLET2014EXPRESS 2500 BASE, VAN CARGO, 6.6L ENG VIN LREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 9 (ENGINE CONTROLS & FUEL - 4.3 (LU3) - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSENGINE CONTROL MODULE REPLACEMENTINSTALLATION PROCEDURE
2014 Chevrolet Express 2500 Base, Van Cargo, 6.6L Eng VIN L
Installation Procedure
2014 Chevrolet Express 2500 Base, Van Cargo, 6.6L Eng VIN LSECTION Installation Procedure
WARNING: This page is about a different car, the 2014 GMC Savana 1500 and 2014 Chevrolet Express 1500. However, it is still accessible from the selected car via links, so may be relevant.
- Install the ECM (4) to the bracket (2).
- Ensure that the ECM bracket tabs (3) fully engage the ECM.
- Connect the engine wiring harness electrical connectors (2) to the ECM (1).
- Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
- If a new ECM was installed, program the ECM. Refer to Control Module References .
- Using a scan tool, set the remaining engine oil life.
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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.