H3 V8-5.3L (2008)
11. Install a transparent hose over the end of the bleeder valve.
12. Submerge the open end of the transparent hose into a transparent container partially filled with Delco Supreme 11(R), GM P/N 12377967
(Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container.
13. Loosen the bleeder valve to purge air from the wheel hydraulic circuit. Allow fluid to flow until air bubbles stop flowing from the bleeder, then
tighten the bleeder valve.
14. With the right rear wheel hydraulic circuit bleeder valve tightened securely, after all air has been purged from the right rear hydraulic circuit,
install a proper box-end wrench onto the LEFT REAR wheel hydraulic circuit bleeder valve.
15. Install a transparent hose over the end of the bleeder valve, then repeat steps 13-14.
16. With the left rear wheel hydraulic circuit bleeder valve tightened securely, after all air has been purged from the left rear hydraulic circuit, install a
proper box-end wrench onto the RIGHT FRONT wheel hydraulic circuit bleeder valve.
17. Install a transparent hose over the end of the bleeder valve, then repeat steps 13-14.
18. With the right front wheel hydraulic circuit bleeder valve tightened securely, after all air has been purged from the right front hydraulic circuit,
install a proper box-end wrench onto the LEFT FRONT wheel hydraulic circuit bleeder valve.
19. Install a transparent hose over the end of the bleeder valve, then repeat steps 13-14.
20. After completing the final wheel hydraulic circuit bleeding procedure, ensure that each of the 4 wheel hydraulic circuit bleeder valves are properly
tightened.
21. Close the J 29532 , or equivalent, fluid tank valve, then disconnect the J 29532 , or equivalent, from the J 44894-A .
22. Remove the J 44894-A from the brake master cylinder reservoir.
23. Fill the brake master cylinder reservoir. Refer to Master Cylinder Reservoir Filling (with RPO BRM) (See: Hydraulic System/Brake Master
Cylinder/Service and Repair/Procedures/Master Cylinder Reservoir Filling (with RPO BRM))Master Cylinder Reservoir Filling (without RPO
BRM) (See: Hydraulic System/Brake Master Cylinder/Service and Repair/Procedures/Master Cylinder Reservoir Filling (without RPO BRM)) .
24. Slowly depress and release the brake pedal. Observe the feel of the brake pedal.
25. 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 HBCi.
Refer to Antilock Brake System Automated Bleed Procedure (with RPO BRM) (See: Antilock Brake System Automated Bleed Procedure
(with RPO BRM))Antilock Brake System Automated Bleed Procedure (without RPO BRM) (See: Antilock Brake System Automated Bleed
Procedure (without RPO BRM)) .
26. Turn the ignition key ON, with the engine OFF. Check to see if the brake system warning lamp remains illuminated.
Important: If the brake system warning lamp remains illuminated, DO NOT allow the vehicle to be driven until it is diagnosed and
repaired.
27. If the brake system warning lamp remains illuminated, refer to Symptoms - Hydraulic Brakes (See: Hydraulic System/Testing and
Inspection/Symptom Related Diagnostic Procedures/Symptoms - Hydraulic Brakes) .
Hydraulic Brake System Bleeding (Pressure with RPO BRM)
Hydraulic Brake System Bleeding (Pressure with RPO BRM)
Special Tools
*
J 29532 Diaphragm Pressure Bleeder, or equivalent
*
J 35589-A Master Cylinder Bleeder Adapter
*
J 44894-A Brake Bleeder Adapter
Caution: Refer to DOT 4 Brake Fluid Caution (See: Service Precautions/Technician Safety Information/DOT 4 Brake Fluid Caution) .
Caution: Refer to Brake Fluid Irritant Caution (See: Service Precautions/Technician Safety Information/Brake Fluid Irritant Caution) .
Caution: Do not remove the reservoir cap while depressing and releasing the brake pedal. If the cap is removed while depressing and releasing the
brake pedal, pressurized brake fluid being returned to the reservoir may leave the reservoir. Personal injury or vehicle damage could result.
Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice (See: Service Precautions/Vehicle Damage Warnings/Brake Fluid
Effects on Paint and Electrical Components Notice) .
Notice: When adding fluid to the brake fluid reservoir or to the clutch fluid reservoir, use only GM Vehicle Care Brake and Clutch Fluid Super DOT-4,
GM P/N 88958860 (Canadian P/N 88901244), or equivalent DOT-4 brake fluid from a clean, sealed container. This polyglycol brake fluid is
hygroscopic and absorbs moisture. Do not use fluid from an open container that may be contaminated with water. Improper or contaminated fluid could
result in damage to the system components.
Notice: Do Not allow the HBCi pump and motor to run more than 1 minute continuously. Allow 2 minutes cool down time between pump run times.
Extended pump and motor run time could create excessive heat, and damage the pump and motor assembly.
