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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1576 (Hydraulic Brake System) >> Repair Instructions >> Brake Master Cylinder Reservoir Hose Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Refer to Brake Fluid Irritant Warning .
CAUTION: Refer to Brake Fluid Effects on Paint and Electrical Components Caution .
    NOTE: The ignition must be in the OFF position, without pausing at ACCESSORY, and without applying the brake pedal to ensure the brake modulator and high pressure accumulator (HPA) pressure relief occurs. This process will take approximately 1 to 3 minutes.
  1. Turn the ignition to OFF, without pausing at ACCESSORY, and remove the ignition key.
    2. NOTE: During the pressure relief process, the fluid level in the master cylinder reservoir will rise. Do not remove the master cylinder reservoir cap during the pressure relief process.
  2. Wait approximately 1 to 3 minutes until the brake modulator and HPA pressure relief is complete.
  3. Remove the brake fluid from the brake master cylinder reservoir until the level is below the reservoir supply hose fitting and discard into an approved container.
  4. Disconnect the brake fluid level sensor electrical connector.
    5. Fig 1: Master Cylinder Reservoir Return Hose Quick Connect & Supply Hose Quick Connect
    GM1892190Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the brake master cylinder reservoir return hose quick connect (1).
  6. Disconnect the brake master cylinder reservoir supply hose quick connect (2).
  7. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  8. Remove the left front wheelhouse liner. Refer to Front Wheelhouse Liner Replacement - Left Side (Chevrolet) or Front Wheelhouse Liner Replacement - Left Side (GMC) .
    9. Fig 2: Identifying Antilock Brake System (ABS) Module Splash Shield Retainer
    GM2172147Courtesy of GENERAL MOTORS CORP.
  9. Remove the antilock brake system (ABS) module splash shield retainer (1).
    10. Fig 3: Identifying ABS Module Splash Shield Bolts
    GM2172148Courtesy of GENERAL MOTORS CORP.
  10. Remove the ABS module splash shield bolts (1).
    11. Fig 4: Identifying ABS Module Splash Shield
    GM2172151Courtesy of GENERAL MOTORS CORP.
  11. Remove the ABS module splash shield (1).
  12. Clean all dirt and debris from the brake pressure modulator valve (BPMV) assembly and the brake hose fittings.
    13. Fig 5: Identifying BPMV Supply Hose Quick Connect Fitting
    GM2172152Courtesy of GENERAL MOTORS CORP.
  13. Disconnect the BPMV supply hose quick connect (1).

    Cap the BPMV inlet port and plug the supply hose to prevent brake fluid loss and contamination.

    14. Fig 6: View Of BPMV Return Hose Quick Connect Fitting
    GM2172155Courtesy of GENERAL MOTORS CORP.
  14. Disconnect the BPMV return hose quick connect (1).

    Cap the BPMV outlet port and plug the return hose to prevent brake fluid loss and contamination.

  15. Release the supply and return hoses from the retainers and remove the hoses from the vehicle.
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