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 MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1615 (HYBRID CONTROLS - DTC P0AFF TO DTC P16F9)DTC P0C1ACIRCUIT/SYSTEM TESTING
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Circuit/System Testing
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION 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 P0A45, P0A46, P0A79, P0BFE, P0C04, P0C08, P0C0E, P0C18, P0C4F, P0C57, P0C58, P0C61, P0C62, P1AFE, P1B04, or P1B10.
- If the specified DTCs are set, repair them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Repair the following conditions if observed:
- Seized or binding drive axle
- Seized or binding transfer case (4 wheel drive option)
- Seized or binding braking system
IMPORTANT: If a seized or binding drive axle is observed, internal transmission damage may have occurred. - Attempt to drive the vehicle and retest for DTC P0C1A.
- If the DTC resets and the vehicle makes no attempt to crank the engine, 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 PIM.
- If the engine initially starts but the vehicle later stalls, replace the 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.