Hummer H2. Manual - part 809

Fig. 59: Exploded View Of Single Piston Caliper Assembly 
Courtesy of GENERAL MOTORS CORP. 

DISC BRAKE SPECIFICATIONS 

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For 2003 disc brake specifications, see SERVICE SPECIFICATIONS under DISC BRAKES in 
SPECIFICATIONS INDEX article in SPECIFICATIONS. 

 

2004 Hummer H2 

2003-04 BRAKES Disc - Hummer

  

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For 2004 disc brake specifications, see SERVICE SPECIFICATIONS under DISC BRAKES in 
SPECIFICATIONS INDEX article in SPECIFICATIONS.  

TORQUE SPECIFICATIONS 

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For 2003 torque specifications, see TORQUE SPECIFICATIONS under DISC BRAKES in 
SPECIFICATIONS INDEX article in SPECIFICATIONS.  

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For 2004 torque specifications, see TORQUE SPECIFICATIONS under DISC BRAKES in 
SPECIFICATIONS INDEX article in SPECIFICATIONS. 

 

2004 Hummer H2 

2003-04 BRAKES Disc - Hummer

  

2004 BRAKES

Park Brake - Hummer H2 

SPECIFICATIONS 

FASTENER TIGHTENING SPECIFICATIONS 

Fastener Tightening Specifications 

DIAGNOSTIC INFORMATION AND PROCEDURES 

DIAGNOSTIC STARTING POINT - PARK BRAKE 

Begin the system diagnosis by reviewing the system description and operation. Reviewing the description and 
operation information will help you determine the correct symptom diagnostic procedure when a malfunction 
exists. Reviewing the description and operation information will also help you determine if the condition 
described by the customer is normal operation. Refer to Symptoms - Park Brake in order to identify the 
correct procedure for diagnosing the system and where the procedure is located. 

SYMPTOMS - PARK BRAKE 

Refer to Park Brake System Description and Operation . 

Visual/Physical Inspection 

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Inspect for aftermarket devices which could affect the operation of the park brake system.  

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Inspect the easily accessible or visible system components for obvious damage or conditions which could 
cause the symptom.  

Symptom List 

Application

Specification

Metric

English

Caliper Mounting Bracket to Axle Flange Nuts

135 N.m

100 lb ft

Cable Support Bracket Bolts

85 N.m

64 lb ft

Park Brake Cable Guide to Frame Bolt

12 N.m

106 lb in

Park Brake Cable to Rear Axle Clip Bolt

25 N.m

18 lb ft

Park Brake Cable to Shock Absorber Bracket Bolt

25 N.m

18 lb ft

Park Brake Lever Mounting Bolts

25 N.m

18 lb ft

Park Brake Warning Lamp Switch Bolt

3 N.m

25 lb in

IMPORTANT: Review the system operation in order to familiarize yourself with the system 

functions.

 

2004 Hummer H2 

2004 BRAKES Park Brake - Hummer H2

  

 

2004 Hummer H2 

2004 BRAKES Park Brake - Hummer H2

  

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

Park Brake Will Not Hold or Release 

PARK BRAKE WILL NOT HOLD OR RELEASE 

Park Brake Will Not Hold or Release 

PARK BRAKE SYSTEM DIAGNOSIS 

Park Brake System Diagnosis 

Step

Action

Yes

No

1

Were you sent here from the Park Brake Symptom table?

Go to 

Step 2

Go to Diagnostic Starting 

Point - Park Brake

2

Inspect the park brake system for proper operation. Refer to 
Park Brake System Diagnosis . 
Did you find and correct a condition?

Go to 

Step 5

Go to Step 3

3

Inspect the disc brake system for proper operation. Refer to 
Disc Brake System Diagnosis in Hydraulic Brakes. 
Did you find and correct a condition?

Go to 

Step 5

Go to Step 4

4

Inspect the hydraulic brake system for proper operation. Refer 
to Hydraulic Brake System Diagnosis in Hydraulic Brakes.
Did you find and correct a condition?

Go to 

Step 5

Go to Diagnostic Starting 

Point - Park Brake

5

Road test the vehicle in order to confirm proper operation. 
Refer to Brake System Vehicle Road Test in Hydraulic 
Brakes. 
Is the condition still present?

Go to 

Step 2

System OK

Step

Action

Yes

No

DEFINITION: This diagnostic table is designed to diagnose ONLY the components of the PARK brake 
system in order to determine if the PARK brake system is operating properly. You will be directed by 
the appropriate Symptom Table to go to other brake system diagnostic tables as appropriate.

1

Were you sent here from a Hydraulic Brake Symptom 
Table?

Go to Step 4

Go to Step 2

2

Were you sent here from a Park Brake Symptom Table?

Go to Step 4

Go to Step 3

3

Is the symptom related to the ability of the park brake 
system to hold and/or release?

Go to Diagnostic 

Starting Point - 

Park Brake

Go to Diagnostic 

Starting Point - 

Hydraulic Brakes in 

Hydraulic Brakes

4

1. Raise and support the vehicle with the rear axle 

supported by jack stands. Refer to Lifting and 
Jacking the Vehicle in General Information.  

2. Shift the transmission into NEUTRAL.  

3. With the park brake RELEASED, attempt to 

rotate the rear wheels to check the rear brakes for 

 

2004 Hummer H2 

2004 BRAKES Park Brake - Hummer H2