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 H1500, VAN PASSENGER, GASREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESPROGRAMMING AND SETUP - ALL SYSTEMSREPAIR INSTRUCTIONSENGINE CONTROL MODULE PROGRAMMING AND SETUP (W/RPO LMM)ECM REPLACEMENT
2008 Chevrolet Chevy Express H1500, Van Passenger, Gas
ECM Replacement
2008 Chevrolet Chevy Express H1500, Van Passenger, GasSECTION ECM Replacement
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 DPF Regeneration Enable. Refer to Exhaust Particulate Filter Cleaning (LMM DPF Service Regeneration) or Exhaust Particulate Filter Cleaning (LMM 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.