HHR L4-2.4L (2010)
19. For Cobalt SS, install a proper box-end wrench onto the LEFT FRONT wheel hydraulic circuit, OUTBOARD bleeder valve.
20. For Cobalt SS, install a transparent hose over the end of the bleeder valve, then repeat steps 13-15.
21. With the left front wheel hydraulic circuit bleeder valve tightened securely and after all air has been purged from the left front wheel hydraulic
circuit, install a proper box-end wrench onto the LEFT REAR wheel hydraulic circuit bleeder valve.
22. Install a transparent hose over the end of the bleeder valve, then repeat steps 13-15.
23. With the left rear wheel hydraulic circuit bleeder valve tightened securely and after all air has been purged from the left rear wheel hydraulic
circuit, install a proper box-end wrench onto the RIGHT FRONT wheel hydraulic circuit bleeder valve.
24. For Cobalt SS, install a proper box-end wrench onto the RIGHT FRONT wheel hydraulic circuit INBOARD bleeder valve.
25. Install a transparent hose over the end of the bleeder valve, then repeat steps 13-15.
26. For Cobalt SS, install a proper box-end wrench onto the RIGHT FRONT wheel hydraulic circuit, OUTBOARD bleeder valve.
27. Install a transparent hose over the end of the bleeder valve, then repeat steps 13-15.
28. After completing the final wheel hydraulic circuit bleeding procedure, ensure each of the 4 wheel hydraulic circuit bleeder valves is properly
tightened.
29. For Cobalt SS, after completing the final wheel hydraulic circuit bleeding procedure, ensure each of the 6 wheel hydraulic circuit bleeder valves is
properly tightened.
30. Close the J-29532 - Diaphragm Type Brake Pressure Bleeder, or equivalent , fluid tank valve, and then disconnect the J-29532 - Diaphragm Type
Brake Pressure Bleeder, or equivalent , from the J-44894-A - Brake Pressure Bleeder Adapter.
31. 31. Remove the J-44894-A - Brake Pressure Bleeder Adapter from the brake master cylinder reservoir.
32. Fill the brake master cylinder reservoir to the maximum-full level with GM approved or equivalent brake fluid from a clean, sealed brake fluid
container.
33. Slowly depress and release the brake pedal. Observe the brake pedal feel.
34. If the brake pedal feels spongy, repeat the bleeding procedure. If the brake pedal stills feels spongy after repeating the bleeding procedure, perform
the following steps:
1. Inspect the brake system for external leaks. Refer to Brake System External Leak Inspection (See: Brakes and Traction Control/Hydraulic
System/Testing and Inspection/Component Tests and General Diagnostics/Brake System External Leak Inspection).
2. If equipped with antilock brakes, 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: ).
35. Turn the ignition ON, with the engine OFF. Check to see if the brake system warning lamp remains illuminated.
Note: DO NOT allow the vehicle to be driven until it is diagnosed and repaired.
36. If the brake system warning lamp remains illuminated, refer to Symptoms - Hydraulic Brakes (See: Brakes and Traction Control/Hydraulic
System/Testing and Inspection/Symptom Related Diagnostic Procedures/Symptoms - Hydraulic Brakes).
