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Home >> Chevrolet >> 2021 >> Bolt EV Premier >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brakes >> Repair Instructions >> Brake Pressure Modulator Valve Front Pipe Replacement >> Removal Procedure

Removal Procedure

WARNING:

Refer to Brake Fluid Irritant Warning .

  1. Disable the high voltage system. High Voltage Disabling
  2. Engine Control Module @ Vehicle - Remove - Engine Control Module Replacement
  3. Clean all dirt and foreign material from the brake pipe fitting.
  4. GM4530378Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Cap the brake pipe fitting and plug the brake master cylinder outlet port to prevent brake fluid loss and contamination.

    Brake Pressure Modulator Valve Front Pipe Fitting (1) @ Brake Master Cylinder (2) - Remove

    Drain the brake fluid out of the master cylinder.

  5. Remove the radiator surge tank bolts and reposition the heater surge tank from the heater surge tank bracket with the hoses connected. Heater Coolant Surge Tank Replacement
  6. GM4529636Courtesy of GENERAL MOTORS COMPANY

    Drive Motor Battery Positive and Negative Cable (1) - Remove - Drive Motor Battery Positive and Negative Cable Replacement

  7. GM4530379Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Cap the brake pipe fitting and plug the brake pressure modulator valve inlet port to prevent brake fluid loss and contamination.

    Brake Pressure Modulator Valve Front Pipe Fitting (1) @ Brake Pressure Modulator Valve (2) - Remove

  8. GM4530380Courtesy of GENERAL MOTORS COMPANY

    Brake Pressure Modulator Valve Front Pipe (1) @ Brake Pipe Clip (2) - Unclip [ 2x ]

  9. Brake Pressure Modulator Valve Front Pipe (1) @ Vehicle - Remove