Silverado 1500 2WD V8-6.0L Hybrid (2009)
7. Release the C-clamp.
8. Remove the nut from the stud.
9. Remove the J-26889 - Compressor .
10. Install the master cylinder to the hydraulic booster. Refer to Master Cylinder Replacement (JD9, JF3, JF7) (See: Hydraulic System/Brake Master
Cylinder/Service and Repair/Removal and Replacement/Master Cylinder Overhaul)Master Cylinder Replacement (Two-Mode Hybrid) (See:
Hydraulic System/Brake Master Cylinder/Service and Repair/Removal and Replacement/Master Cylinder Replacement)Master Cylinder
Replacement (JH6, JH7) (See: Hydraulic System/Brake Master Cylinder/Service and Repair/Removal and Replacement/Master Cylinder
Replacement) .
11. Release the park brake and unblock the wheels.
Power Brake Booster Pressure Sensor Replacement
Power Brake Booster Pump Fluid Accumulator Replacement (Two-mode Hybrid)
Removal Procedure
Warning
The high pressure accumulator (HPA) and the chambers of the brake modulator assembly to which it attaches, store brake fluid at extremely high
pressures. Fluid pressure must be relieved before attempting to service the HPA. Ensure that the recommended procedures are followed to relieve system
pressure, including using the manual pressure release steps. Failure to properly follow procedures to depressurize the system may result in personal
injury.
Warning: Refer to Brake Fluid Irritant Warning (See: Service Precautions/Technician Safety Information/Brake Fluid Irritant Warning) .
Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution (See: Service Precautions/Vehicle Damage Warnings) .
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. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (See: Maintenance/Vehicle Lifting/Service and Repair) .
