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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Diagnostic Information and Procedures >> DTC C027D or C028D: Park Brake Slip/Brake Pad >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify no additional DTCs are set in other control modules.
    • If no additional DTCs are set 
  3. Verify that DTC C027D or C028D is not set.
    • If the DTC is set 
    1. Verify the park brake cable is connected properly. Refer to Park Brake System Diagnosis 
    2. Check park brake pads for excessive wear. Refer to Disc Brake System Diagnosis
    3. Program the K83 Parking Brake Control Module. Refer to Electronic Parking Brake Control Module Programming and Setup .
    4. Ignition ON. Apply and release the park brake.
    5. Verify the DTC is not set.
      • If the DTC is set, replace the K83 Parking Brake Control Module.
      • If the DTC is not set
    6. All OK.
    • If the DTC is not set 
  4. All OK.
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