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 G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESPROGRAMMING AND SETUP - ALL SYSTEMSREPAIR INSTRUCTIONSENGINE CONTROL MODULE PROGRAMMING AND SETUP (W/RPO LMM)ECM REPROGRAMMING
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
ECM Reprogramming
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION ECM Reprogramming
- Record Fuel Filter Life.
- Enable ECM Reprogramming-Refer to Service Programming System (SPS) .
- Reset Fuel Filter Life to the recorded value.
- 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.
IMPORTANT:
It is necessary to record Fuel Filter Life before reprogramming. The ECM reprogramming procedure will reset Fuel Filter Life to zero.
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.