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 DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2072 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 6.6L (LMM) - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSTURBOCHARGER LEARNLEARN PROCEDURE WITH THE TECH 2
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Learn Procedure With the Tech 2
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Learn Procedure With the Tech 2
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Once the enable conditions have been met the throttle must remain at idle. Do not change the accelerator pedal position (APP) during this procedure.
- The following conditions must be met for the ECM to perform the turbocharger learn procedure:
- The A/C is OFF.
- The vehicle is in Park or Neutral.
- Start and idle the engine.
- The engine coolant temperature (ECT) is greater than 40°C (104°F).
- After the enable conditions have been met and the engine idle is stabilized, enter the TC Learn Output function from the Module Setup Menu. Command the TC Learn ON for at least 5 seconds, then command it OFF. The system should have learned the new turbocharger position. The TC Vane Pos. Lrn This Run Cycle parameter should have toggled from No to Yes.
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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.