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 1672 (HYBRID CONTROLS - DTC P181C TO DTC P2797)DTC P1B0F OR P1B10CIRCUIT/SYSTEM TESTING
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Circuit/System Testing
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Circuit/System Testing
WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect for DTCs P0A40, P0A45, P0A46, P0A78, P0A79, P0A3F, P0C05, P0C08, P0C0B, P0C0E, P0C4E, P0C4F, P0C52, P0C53, P0C57, P0C58, P0C61, P0C62, P0C5C, P0C5D, P1B03, P1B04 or P1B0D.
- If any of the above DTCs are set, diagnose and repair them prior to performing this diagnostic.
- Ignition ON, engine OFF. Observe the BECM Hybrid Battery Pack Calculated parameter. The hybrid battery voltage should be greater than 192V.
- If the hybrid battery voltage is less than 192V, replace the drive motor generator battery.
- Turn the ignition OFF and wait 2 minutes.
- Ignition ON, monitor DTC Status. DTC P1B10 and P1B0F should have passed last test.
- If DTC P0C4E or P0C4F sets, proceed to that diagnostic procedure.
- If DTC P1B10 and P1B0F have passed, clear DTC Information. No further diagnosis is necessary.
- If DTC P1B10 or P1B0F resets, program the PIM with the latest software version and recheck for DTCs. If the DTC resets after programming or if the PIM already contains the latest software version, replace the applicable drive motor generator assembly.
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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.