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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 58 (Hydraulic Brakes - Repair Instructions) >> Repair Instructions >> Brake Master Cylinder Reservoir Replacement (without Blackwing) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
  2. GM5325063

    Using the appropriate trim tool, remove the windshield wiper arm finish caps (1) from both windshield wiper arms (3).

  3. Windshield Wiper Arm Nut (2) - Remove [2x]
  4. Grasp the outer ends of the windshield wiper arms (3) and gently rock both arms back and forth to remove the windshield wiper arms (3) from the windshield wiper transmission pivot shafts.
  5. GM5417116

    Apply two layers of masking tape on the body around the top edges of the air inlet grille panel extensions (1) to prevent paint damage.

  6. Using a suitable plastic trim tool, carefully release the air inlet grille panel extension (1) clips.
  7. Remove the air inlet grille panel extensions (1) from the air inlet grille panel and both upper front fenders.
  8. GM5421986

    Remove the hood rear outer air inlet seal retainers (1) from both sides.

  9. Remove the hood rear outer air inlet seals (2) from both sides.
  10. GM5421990

    Remove the front compartment side sight shield retainers (1) from both sides.

  11. Remove the front compartment side sight shields (2) from both sides.
  12. GM5417442

    Air Inlet Grille Panel Retainer (1) - Remove [6x]

  13. Air Inlet Grille Panel (2) - Remove
  14. Disconnect the windshield washer nozzle hose from the windshield washer pump hose.
  15. Lift the front edge of the air inlet grille panel (2) and slide the panel forward from both hood hinges and remove.
  16. GM5420286

    Windshield Wiper System Module Shield (1) - Remove

  17. GM5420344

    Disconnect the windshield wiper motor electrical connector.

  18. Windshield Wiper System Module Bolt (1) - Remove [2x]
  19. Slide the windshield wiper system module (2) inboard to release the grommet from the plenum and remove the windshield wiper system module (2) from the vehicle.
  20. GM5422039

    Plenum Front Panel Nut (1) - Remove [3x]

  21. Plenum Front Panel Bolt (2) - Remove [3x]
  22. Pull the forward lamp wiring harness extension (3) out from the plenum front panel.
  23. GM5422041

    Plenum Front Panel Bolt (1) - Remove [4x]

  24. Plenum Front Panel Nut (2) - Remove [3x]
  25. Pull the forward lamp wiring harness extension (3) out from the plenum front panel.
  26. GM5422044

    Plenum Front Panel (1) - Remove

  27. GM5491702

    Electrical Connector (1) @ Brake Fluid Level Sensor - Disconnect

  28. Remove and properly dispose of the brake fluid in the master cylinder reservoir.
  29. GM5992399

    Brake Master Cylinder Reservoir Bolt (3) - Remove

  30. Lift the front of the brake master cylinder reservoir (1) upwards with the brake master cylinder reservoir grommets (2) attached and remove and DISCARD from the brake master cylinder.
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