BRAKE MASTER CYLINDER WITH POWER BRAKE BOOSTER AND CHASSIS CONTROL

MODULE REPLACEMENT (LHD)

Removal Procedure

CAUTION: Refer to Brake Fluid Irritant Caution.

NOTE: Refer to Brake Fluid Effects on Paint and Electrical Components

2007 BRAKES Antilock Brake System - H3

Notice.

1. Apply and release the brake pedal 20 times to deplete the hydraulic brake booster accumulator reserve.

BRAKE MASTER CYLINDER WITH POWER BRAKE BOOSTER AND CHASSIS CONTROL

Fig. 22: Identifying Rear And Left Front Brake Pipes At Brake Master Cylinder Courtesy of GENERAL MOTORS CORP.

2. Remove the rear and left front brake pipes from the brake master cylinder.

Cap the brake pipe fittings and plug the master cylinder outlet ports to prevent brake fluid loss and contamination.

BRAKE MASTER CYLINDER WITH POWER BRAKE BOOSTER AND CHASSIS CONTROL

Fig. 23: Identifying Right Front Brake Pipe At Brake Master Cylinder Courtesy of GENERAL MOTORS CORP.

2007 BRAKES Antilock Brake System - H3

3. Remove the right front brake pipe from the brake master cylinder.

Cap the brake pipe fittings and plug the master cylinder outlet ports to prevent brake fluid loss and contamination.

4. Disconnect the electrical connectors at the brake pressure modulator valve (BPMV).

5. Disconnect the electrical connector for the fluid level sensor.

6. Remove the knee bolster. Refer to Driver Knee Bolster Replacement (Left Hand Drive) or Driver Knee Bolster Replacement (Right Hand Drive) .

7. Remove the knee bolster bracket. Refer to Driver Knee Bolster Bracket Replacement (Left Hand Drive) or Driver Knee Bolster Bracket Replacement (Right Hand

2007 BRAKES Antilock Brake System - H3

BRAKE MASTER CYLINDER WITH POWER BRAKE BOOSTER AND CHASSIS CONTROL

Fig. 24: Locating Clevis Pin At Master Cylinder Push Rod Courtesy of GENERAL MOTORS CORP.

Drive) .

8. Remove the retainer from the clevis pin.

9. Remove the clevis pin from the master cylinder push rod and the brake pedal.

BRAKE MASTER CYLINDER WITH POWER BRAKE BOOSTER AND CHASSIS CONTROL

Fig. 25: Master Cylinder Removal/Installation Courtesy of GENERAL MOTORS CORP.

2007 BRAKES Antilock Brake System - H3

IMPORTANT: It may be necessary to reposition or remove some of the

wiring harnesses from their retainers to provide clearance to remove the mounting nuts for the brake master cylinder assembly.

10. Remove the mounting nuts for the brake master cylinder (2).

11. Remove the brake master cylinder and power brake booster assembly (1).

Installation Procedure

BRAKE MASTER CYLINDER WITH POWER BRAKE BOOSTER AND CHASSIS CONTROL

Fig. 26: Master Cylinder Removal/Installation Courtesy of GENERAL MOTORS CORP.

2007 BRAKES Antilock Brake System - H3

1. Install the brake master cylinder and power brake booster assembly (1). NOTE: Refer to Fastener Notice.

2. Install the master cylinder nuts (2).

Tighten: Tighten the nuts to 30 N. m (22 lb ft).

BRAKE MASTER CYLINDER WITH POWER BRAKE BOOSTER AND CHASSIS CONTROL

Fig. 27: Locating Clevis Pin At Master Cylinder Push Rod Courtesy of GENERAL MOTORS CORP.

2007 BRAKES Antilock Brake System - H3

3. Install the clevis pin to the master cylinder push rod and the brake pedal.

4. Install the retainer to the clevis pin.

5. Install the knee bolster bracket. Refer to Driver Knee Bolster Bracket Replacement (Left Hand Drive) or Driver Knee Bolster Bracket Replacement (Right Hand Drive) .

6. Install the knee bolster. Refer to Driver Knee Bolster Replacement (Left Hand Drive) or Driver Knee Bolster Replacement (Right Hand Drive) .

2007 BRAKES Antilock Brake System - H3

7. Connect the electrical connector for the brake fluid level sensor.

8. Connect the electrical connectors at the BPMV.

BRAKE MASTER CYLINDER WITH POWER BRAKE BOOSTER AND CHASSIS CONTROL

Fig. 28: Identifying Right Front Brake Pipe At Brake Master Cylinder Courtesy of GENERAL MOTORS CORP.

9. Install the right front brake pipe fitting to the master cylinder.

Tighten: Tighten the fittings to 19 N. m (14 lb ft).

BRAKE MASTER CYLINDER WITH POWER BRAKE BOOSTER AND CHASSIS CONTROL

Fig. 29: Identifying Rear And Left Front Brake Pipes At Brake Master Cylinder Courtesy of GENERAL MOTORS CORP.

2007 BRAKES Antilock Brake System - H3

10. Install the rear and left front brake pipe fittings to the brake master cylinder.

Tighten: Tighten the fittings to 19 N. m (14 lb ft).

11. Adjust the stop lamp switch. Refer to Stop Lamp Switch Adjustment.

12. Bleed the brake system. Refer to Hydraulic Brake System Bleeding (Manual) or Hydraulic Brake System Bleeding (Pressure) .

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