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Home >> GMC >> 2024 >> Acadia AT4 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brakes >> Diagnostic Information and Procedures >> DTC C004B: >> Circuit / System Verification

Circuit / System Verification

  1. Ignition / Vehicle Off
  2. Verify the brake fluid level is not low.
    • If the fluid is low 

      Repair as necessary

    • Go to next step: If the fluid is not low 
  3. Refer to Circuit / System Testing.
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