Silverado 1500 2WD V8-6.0L Hybrid (2009)
13. Connect the J-29532-A - Brake Pressure Bleeder , orJ-29532 - Diaphragm Pressure Bleeder , or equivalent, to the J-35589-A - Brake Pressure
Bleeder Adapter, or equivalent .
14. Set the pressure regulator of the J-29532-A - Brake Pressure Bleeder , or charge the air tank of the J-29532 - Diaphragm Pressure Bleeder , to 200
kPa (30 psi).
15. Open the J-29532-A - Brake Pressure Bleeder , orJ-29532 - Diaphragm Pressure Bleeder , or equivalent, fluid tank valve to allow pressurized
brake fluid to enter the brake system.
16. Wait approximately 30 seconds, then inspect the entire hydraulic brake system in order to ensure there are no existing external brake fluid leaks.
Any brake fluid leaks identified require repair prior to completing this procedure.
17. Use the following sequence for bleeding the wheel hydraulic circuits:
*
Right rear
*
Left rear
*
Right front
*
Left front
18. Install a proper box-end wrench onto the appropriate wheel hydraulic circuit bleeder valve.
19. Secure a transparent bleeder hose to the bleeder valve.
20. Submerge the open end of the transparent hose into a transparent container partially filled with GM approved or equivalent DOT-3 brake fluid
from a clean, sealed brake fluid container.
21. Loosen the bleeder valve to purge air from the wheel hydraulic circuit. Allow fluid to flow for 30 seconds, or until air bubbles stop flowing from
the bleeder, then tighten the bleeder valve.
22. With the first wheel hydraulic circuit bleeder valve tightened securely, repeat steps 18-21 for the remaining wheel hydraulic circuits in the proper
sequence.
23. After completing the final wheel hydraulic circuit bleeding procedure, ensure that each of the 4 wheel hydraulic circuit bleeder valves are properly
tightened.
24. Close the J-29532-A - Brake Pressure Bleeder , orJ-29532 - Diaphragm Pressure Bleeder , or equivalent, fluid tank valve, then disconnect the
J-29532-A - Brake Pressure Bleeder , orJ-29532 - Diaphragm Pressure Bleeder , or equivalent, from the J-35589-A - Brake Pressure Bleeder
Adapter, or equivalent .
25. Remove the J-35589-A - Brake Pressure Bleeder Adapter, or equivalent from the brake master cylinder reservoir.
26. Fill the brake master cylinder reservoir to the maximum-fill level with GM approved, or equivalent DOT-3 brake fluid from a clean, sealed brake
fluid container.
27. Slowly depress and release the brake pedal. Observe the feel of the brake pedal.
Note
If it is determined that air was introduced into the system upstream of the ABS modulator prior to servicing, theAntilock Brake System Automated Bleed
Procedure (See: Brake Bleeding/Service and Repair) must be performed.
28. If the brake pedal feels spongy perform the following steps:
1. Inspect the brake system for external leaks. Refer to Brake System External Leak Inspection (See: Hydraulic System/Testing and
Inspection/Component Tests and General Diagnostics/Brake System External Leak Inspection) .
2. Using a scan tool, perform the antilock brake system automated bleeding procedure to remove any air that may have been trapped in the brake
pressure modulator valve (BPMV). Refer to Antilock Brake System Automated Bleed Procedure (See: Brake Bleeding/Service and Repair) .
29. Turn the ignition key ON, with the engine OFF. Check to see if the brake system warning lamp remains illuminated.
Note
If the brake system warning lamp remains illuminated, DO NOT allow the vehicle to be driven until it is diagnosed and repaired.
30. If the brake system warning lamp remains illuminated, refer toSymptoms - Hydraulic Brakes (See: Hydraulic System/Testing and
Inspection/Symptom Related Diagnostic Procedures/Symptoms - Hydraulic Brakes) .
Power Brake Booster Outlet Front Pipe Replacement
Power Brake Booster Pump Fluid Accumulator Replacement (Non-Hybrid)
Special Tools
J-26889 - Accumulator Piston Compressor
Removal Procedure
Warning