Hummer H2. Manual - part 841

Fig. 50: Park Brake Actuator & Rubber Boot 
Courtesy of GENERAL MOTORS CORP. 

7. Remove the actuator (2) and rubber boot (1).  

Installation Procedure 

 

2004 Hummer H2 

2004 BRAKES Park Brake - Hummer H2

  

Fig. 51: Park Brake Actuator & Rubber Boot 
Courtesy of GENERAL MOTORS CORP. 

1. Install the rubber boot (1) and the actuator (2).  

2. Install the park brake shoe. Refer to Park Brake Shoe Replacement .  

3. Install the axle shaft. Refer to Rear Axle Shaft Replacement in Rear Drive Axle.  

4. Adjust the park brake shoe. Refer to Park Brake Adjustment .  

5. Install the rotor. Refer to Brake Rotor Replacement - Rear in Disc Brakes.  

6. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and 

Wheels.  

7. Remove the safety stands.  

8. Lower vehicle.  

9. Enable the park brake cable automatic adjuster. Refer to Enabling the Park Brake Cable Automatic 

Adjuster in Park Brake.  

PARK BRAKE ADJUSTMENT 

CAUTION: Refer to Brake Dust Caution in Cautions and Notices.

 

2004 Hummer H2 

2004 BRAKES Park Brake - Hummer H2

  

Tools Required 

J 21177-A Drum-to-Brake Shoe Clearance Gauge. See Special Tools and Equipment . 

Park Brake Shoe Adjustment 

Fig. 52: Applying J 21177-A To Inside Of Brake Drum 
Courtesy of GENERAL MOTORS CORP. 

1. Set the J 21177-A so that it contacts the inside diameter of the rotor (1). See Special Tools and 

IMPORTANT: The park brake shoes must be adjusted before the park brake pedal is 

adjusted.

 

2004 Hummer H2 

2004 BRAKES Park Brake - Hummer H2

  

Equipment . 

Fig. 53: Adjusting Parking Brake Shoes Using J 21177-A 
Courtesy of GENERAL MOTORS CORP. 

2. Position the J 21177-A over the shoe (1) and the lining at the widest point. See Special Tools and 

Equipment .  

3. Turn the adjuster nut until the lining just contacts the J 21177-A . See Special Tools and Equipment .  

4. Repeat steps 1-3 for the opposite side.  

5. The clearance between the park brake shoe and the rotor is 0.6604 mm (0.026 in).  

Park Brake Pedal Adjustment 

 

2004 Hummer H2 

2004 BRAKES Park Brake - Hummer H2