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Home >> Chevrolet >> 2021 >> Trailblazer RS, 4WD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brakes >> Repair Instructions >> Brake Master Cylinder Reservoir Replacement (Upper) >> Removal Procedure

Removal Procedure

WARNING:

The battery must be disconnected to prevent the brake master cylinder from pressurizing the hydraulic system during its automated self diagnostic tests that can possibly occur when a door is opened or the key transmitter is activated. Failure to follow this precaution may cause personal injury.

WARNING:

Do NOT clamp the brake master cylinder reservoir tube to stop the flow of brake fluid. Doing so could cause damage to the tube, degradation of braking performance, and potential loss of brakes. Failure to follow this warning may cause component damage or personal injury.

  1. Drain and properly dispose of the brake fluid in the master cylinder reservoir.
  2. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
  3. GM5225109Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) @ Brake Fluid Level Indicator Switch (2) - Disconnect

  4. GM5225110Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    Do NOT clamp the brake master cylinder reservoir tube to stop the flow of brake fluid. Doing so could cause damage to the tube, degradation of braking performance, and potential loss of brakes. Failure to follow this warning may cause component damage or personal injury.

    Quick Connect Fitting (1) @ Brake Master Cylinder - Disconnect

  5. GM5225111Courtesy of GENERAL MOTORS COMPANY

    Brake Master Cylinder Reservoir Bracket Nut (1) - Remove [2x]

  6. Brake Master Cylinder Reservoir- Upper (2) - Remove
  7. Transfer components as necessary.