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 MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 507 (PROGRAMMING AND SETUP - ALL SYSTEMS)REPAIR INSTRUCTIONSENGINE CONTROL MODULE PROGRAMMING AND SETUP (W/RPO LMM)ECM REPLACEMENT
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
ECM Replacement
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION ECM Replacement
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 GMC Savana Special, 2009 GMC Savana Camper Special, 2009 GMC Savana, 2009 Chevrolet RV Cutaway, and 2009 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
If the engine control module (ECM) is replaced, the following procedures must be performed:
- Capture the Option data.
- Enable ECM Reprogramming-Refer to Service Programming System (SPS) .
- Restore the Option data in the new ECM.
- Start and idle vehicle.
- Using the scan tool, perform the Turbocharger Learn Procedure. Refer to Turbocharger Learn .
- Perform a Diesel Particulate Filter (DPF) Regeneration Enable .
- If necessary, perform the following:
- Theft Deterrent-Refer to Theft Deterrent Control Module Programming and Setup .
- The Fuel Injector Flow Rate Programming-Refer to Fuel Injector Flow Rate Programming .
- Engine Oil Life Remaining-Use scan tool to reset Engine Oil Life.
- Fuel Filter Life-Use scan tool to reset Fuel Filter Life.
IMPORTANT:
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.