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 MANUALSBUICK2013REGAL TURBO PREMIUM, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 18 (HYBRID/EV COOLING SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESGENERATOR CONTROL MODULE COOLANT PUMP MALFUNCTION - DTC P0CC1-P0CC4CIRCUIT/SYSTEM VERIFICATION
2013 Buick Regal Turbo Premium, Standard Trans
Circuit/System Verification
2013 Buick Regal Turbo Premium, Standard TransSECTION Circuit/System Verification
WARNING: This page is about a different variant/trim than selected.
- Verify the coolant level of the starter/generator cooling system is normal.
- If the coolant level is low
Inspect the starter/generator cooling system for any leaks.
- If the coolant level is normal
- If the coolant level is low
- Verify the starter/generator cooling system auxiliary radiator is clear of any debris, bent fins, or other damage which may inhibit airflow.
- If debris are found
Clean the auxiliary radiator.
- If damage is found
Replace the auxiliary radiator.
- If the coolant level is normal
- If debris are found
- Verify the starter/generator cooling system hoses are properly routed and are not kinked.
- If any hoses are improperly routed or kinked
Remove and properly route the hose.
- If all hoses are routed properly and are not kinked
- If any hoses are improperly routed or kinked
- Ignition ON.
- Verify the G43 Starter/Generator Coolant Pump turns ON and OFF when commanding the Motor Coolant Pump Relay Enable ON and OFF with a scan tool. The G22 Starter/Generator Control Module coolant pump will make an audible noise during operation.
- If the G43 Starter/Generator Coolant Pump does not turn ON and OFF
Refer to Circuit/System Testing .
- If the G43 Starter/Generator Coolant Pump turns ON and OFF
- If the G43 Starter/Generator Coolant Pump does not turn ON and OFF
- All OK.
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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.