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Home >> GMC >> 2023 >> Hummer EV Edition 1 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brakes >> Diagnostic Information and Procedures >> DTC C15C7 >> Circuit/System Verification

Circuit/System Verification

  1. Visually inspect the brake fluid level through the brake master cylinder reservoir. Refer to: Brake Master Cylinder Reservoir Filling 
  2. Perform the scan tool control function: Automated Brake Bleed 
  3. Confirm the B20 Brake Fluid Level Sensor electrical connector is connected.
  4. Ignition/Vehicle - Off - For greater than 10 s
  5. Clear DTCs
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