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 DIAGNOSISBRAKESPARKING BRAKE SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC C056DCIRCUIT/SYSTEM VERIFICATION
2013 Buick Regal Turbo Premium, Standard Trans
Circuit/System Verification
2013 Buick Regal Turbo Premium, Standard TransSECTION Circuit/System Verification
- Ignition ON.
- Verify DTC C056D 36 is not set.
- If DTC C056D 36 is set
- Program the K83 Parking Brake Control Module. Refer to Electronic Parking Brake Control Module Programming and Setup .
- Ignition ON.
- Apply and release the park brake.
- Verify the DTC is not set.
- If the DTC is set, replace the K83 Parking Brake Control Module.
- If the DTC is not set
- All OK.
- If DTC C056D 36 is not set
- Perform the Parking Brake Motor Reset procedure with a scan tool for the Parking Brake Control Module.
- Verify DTC C056D is not set.
- If DTC C056D is set
Replace the K83 Parking Brake Control Module.
- If DTC C056D is not set
- If DTC C056D is set
- 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.