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Home >> GMC >> 2021 >> Yukon XL AT4 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brakes >> Repair Instructions >> Front and Rear Brake Pipe Replacement >> Installation Procedure

Installation Procedure

  1. GM5568607Courtesy of GENERAL MOTORS COMPANY

    Front and Rear Brake Pipe (1) - Install

  2. GM5568605Courtesy of GENERAL MOTORS COMPANY

    Remove the plugs from the front crossover brake pipe connector and rear brake pipe connector inlets.

  3. Front and Rear Brake Pipe (2) - Install
  4. Front and Rear Brake Pipe Nut (1) - Install and tighten [ 4x ] - Fastener Specifications 
  5. GM5549253Courtesy of GENERAL MOTORS COMPANY

    Remove the plugs from the brake master cylinder outlets.

  6. Front and Rear Brake Pipe (2) @ Brake Master Cylinder - Install
  7. Front and Rear Brake Pipe Nut (1) @ Brake Master Cylinder - Install and tighten [ 4x ] - Fastener Specifications 
  8. GM5570480Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector @ Brake System Control Module (1) - Connect

  9. Front Wheelhouse Liner - Left Side - Install Front Wheelhouse Liner Replacement
  10. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection (KL9)
  11. Bleed the brake system. Hydraulic Brake System Bleeding 
  12. Install the left front tire and wheel assembly. Tire and Wheel Removal and Installation (Aluminum Wheel)
  13. Remove the support and lower the vehicle.
  14. Fill the brake master cylinder reservoir to the maximum-full level with GM approved brake fluid from a clean, sealed brake fluid container. Brake Master Cylinder Reservoir Filling