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 MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1475 (HYBRID ENERGY STORAGE SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P0C76CIRCUIT/SYSTEM VERIFICATION
2006 Chevrolet Suburban C2500, 6.0 U
Circuit/System Verification
2006 Chevrolet Suburban C2500, 6.0 USECTION Circuit/System Verification
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.
- Clear the DTC information. To clear this DTC from the HPCM, you must use the scan tool Special Functions feature, under the HPCM special functions list only after the repair is complete.
- Turn the ignition OFF for 3 minutes.
- Turn the ignition ON.
- Retest for DTC P0C76.
- Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the freeze frame/failure records data.
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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.