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 MANUALSCHEVROLET2011CHEVY EXPRESS G3500, VAN CARGO EXTENDED, 6.6 LREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESPROGRAMMING AND SETUP - ALL SYSTEMSREPAIR INSTRUCTIONSENGINE CONTROL MODULE PROGRAMMING AND SETUP (LGH OR LML)ECM REPLACEMENT
2011 Chevrolet Chevy Express G3500, Van Cargo Extended, 6.6 L
ECM Replacement
2011 Chevrolet Chevy Express G3500, Van Cargo Extended, 6.6 LSECTION ECM Replacement
If the engine control module (ECM) is replaced, the following procedures must be performed:
- Enable ECM Reprogramming-Refer to Service Programming System (SPS) .
- Perform a Theft Deterrent Module Programming and Setup-Refer to Theft Deterrent Module Programming and Setup .
- Perform a Fuel Injector Flow Rate Programming - Refer to Fuel Injector Flow Rate Programming
- Perform a Diesel Particulate Filter (DPF) Service Regeneration-Refer to Diesel Particulate Filter (DPF) Service Regeneration .
NOTE:
Clear any DTCs that may have set after completing the programming procedure.
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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.