Hummer H3. Manual — part 646

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

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

2. Install the master cylinder nuts (2).

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

NOTE:

Refer to Fastener Notice .

2007 Hummer H3

2007 BRAKES Antilock Brake System - H3

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

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 Hummer H3

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.

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).

2007 Hummer H3

2007 BRAKES Antilock Brake System - H3

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

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) .

BRAKE MASTER CYLINDER WITH POWER BRAKE BOOSTER AND CHASSIS CONTROL
MODULE REPLACEMENT (RHD)

2007 Hummer H3

2007 BRAKES Antilock Brake System - H3