Hummer H2. Manual - part 2186

1

Did you review the General Description and perform the 
necessary Inspections?

Go to 

Step 2

Go to Symptoms - 

Suspension General 

Diagnosis

2

Attempt to duplicate the condition. Road test the vehicle. 
Did you duplicate the condition?

Go to 

Step 3

System OK

3

Is the noise reactive to vehicle load or speed?

Go to 

Step 4

Go to Step 7

4

Inspect the tires for the following condition: 

z

Proper tire Inflation and adjust as necessary. Refer to Tire 
Inflation Pressure Specifications in Maintenance and 
Lubrication.  

z

Unusual tire wear. Refer to Vibration Analysis - Tire 
and Wheel in Vibration Diagnosis and Correction.  

z

Inspect the wheel nuts for looseness and tighten as 
necessary. Refer to Fastener Tightening Specifications 
in Tires and Wheels.  

 
Did you find and correct the condition?

Go to 

Step 14

Go to Step 5

5

Inspect the front wheel bearings. Refer to Wheel Bearings 
Diagnosis . 
Did you find and correct the condition?

Go to 

Step 14

Go to Step 6

6

Inspect for front axle noises. Refer to Symptoms - Front Drive 
Axle in Front Drive Axle. 
Did you find and correct the condition?

Go to 

Step 14

Go to Step 7

7

Bounce the front of the vehicle in order to duplicate the noise. 
Did you duplicate the noise?

Go to 

Step 8

Go to Step 9

8

1. Raise and support the vehicle. Refer to Lifting and 

Jacking the Vehicle in General Information.  

2. Inspect the front suspension components for looseness. 

Refer to Fastener Tightening Specifications .  

3. Inspect the front suspension components for damage and 

repair as necessary.  

Did you find and correct the condition?

Go to 

Step 14

Go to Step 9

9

1. Install the J 39570 Chassis Ear or equivalent.  

2. Bounce the front of the vehicle, using the J 39570 or 

equivalent in order to locate the source of the noise. If 
necessary road test the vehicle.  

3. Repair or replace any damaged components as necessary.  

Did you find and correct the condition?

Go to 

Step 14

Go to Step 10

 

2004 Hummer H2 

2004 SUSPENSION Suspension General Diagnosis - Hummer H2

  

NOISE DIAGNOSIS - REAR SUSPENSION 

Noise Diagnosis - Rear Suspension 

10

Inspect the ball joints and steering components for the following 
conditions. 

z

Lack of lubrication where applicable.  

z

Looseness in the ball joints.  

z

Looseness in the steering linkage. Refer to Steering 
Linkage Inspection in Steering Linkage (Non Rack and 
Pinion).  

z

Looseness in the tie rods. Refer to Tie Rod Replacement 
- Outer or Tie Rod Replacement - Inner in Steering 
Linkage (Non Rack and Pinion).  

 
Did you find and correct the condition?

Go to 

Step 14

Go to Step 11

11

Inspect for damaged shock absorbers. Refer to Struts or Shock 
Absorbers On-Vehicle Testing . 
Did you find and correct the condition?

Go to 

Step 14

Go to Step 12

12

Inspect the front stabilizer shaft and stabilizer shaft links for 
damage and repair as necessary. Refer to Stabilizer Shaft 
Replacement in Front Suspension. 
Did you find and correct the condition?

Go to 

Step 14

Go to Step 13

13

Inspect for control arm damage and repair as necessary. Refer to 
Lower Control Arm Replacement or Upper Control Arm 
Replacement in Front Suspension. 
Did you find and correct the condition?

Go to 

Step 14

-

14

Operate the system in order to verify the repair. 
Did you correct the condition?

System 

OK

Go to Step 3

Step

Action

Yes

No

DEFINITION: Any noise emitted from the rear of the vehicle that is induced by VEHICLE SPEED or 
DRIVING TERRAIN as related to the rear suspension.

1

Did you review the General Description and perform the 
necessary inspections?

Go to 

Step 2

Go to Symptoms - 

Suspension General 

Diagnosis

2

Attempt to duplicate the condition. Road test the vehicle. 
Did you duplicate the condition?

Go to 

Step 3

System OK

3

Is the noise reactive to vehicle load or speed?

Go to 

Step 4

Go to Step 6

Perform the following Inspections: 

z

Inspect and adjust the tire Inflation. Refer to Tire 

 

2004 Hummer H2 

2004 SUSPENSION Suspension General Diagnosis - Hummer H2

  

BALL JOINT INSPECTION (LOWER BALL JOINT) 

Tools Required 

J 8001 Dial Indicator Set 

Lower Ball Joint Inspection 

4

Inflation Pressure Specifications in Maintenance and 
Lubrication.  

z

Inspect for unusual tire wear. Refer to Vibration 
Analysis - Tire and Wheel in Vibration Diagnosis and 
Correction.  

z

Inspect the wheel nuts for looseness. Refer to Fastener 
Tightening Specifications in Tire and Wheels.  

 
Did you find and correct the condition?

Go to 

Step 10

Go to Step 5

5

Inspect the rear axle for rear axle noises. Refer to Symptoms - 
Rear Drive Axle . 
Did you find and correct the condition?

Go to 

Step 10

Go to Step 6

6

Bounce the rear of the vehicle in order to duplicate the noise. 
Did you duplicate the noise?

Go to 

Step 7

Go to Step 9

7

1. Raise the vehicle. Refer to Lifting and Jacking the 

Vehicle in General Information.  

2. Inspect the rear suspension components for looseness 

and tighten as necessary. Refer to Fastener Tightening 
Specifications in Rear Suspension.  

3. Inspect the rear suspension components for damage and 

repair as necessary.  

Did you find and correct the condition?

Go to 

Step 10

Go to Step 8

8

Inspect the rear shock absorber. Refer to Struts or Shock 
Absorbers On-Vehicle Testing . 
Did you complete the inspection?

Go to 

Step 10

Go to Step 09

9

1. Install the J 39570 Chassis Ear or equivalent.  

2. Bounce the rear of the vehicle, using the J 39570 or 

equivalent, in order to locate the source of the noise. If 
necessary road test the vehicle.  

3. Repair or replace any defective component as necessary. 

Did you find and correct the condition?

Go to 

Step 10

System OK

10

Operate the system in order to verify the repair. 
Did you correct the condition?

System 

OK

Go to Step 3

 

2004 Hummer H2 

2004 SUSPENSION Suspension General Diagnosis - Hummer H2

  

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.  

2. With the wheel and tire on the vehicle, lift the suspension corner by hand to determine if any looseness is 

present. If vertical free play is experienced proceed with the following instructions.  

3. Remove the wheel and tire. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.  

4. Clean and inspect the ball joint seals for cuts or tears. If the ball joint seals are damaged, replace the ball 

joint. Refer to Lower Ball Joint Replacement in Front Suspension.  

5. Install and position the dial indicator from J 8001 against the end of the ball joint. 

Fig. 1: Installing & Positioning Dial Indicator From J 8001 Against End Of Ball Joint Suspension 
Courtesy of GENERAL MOTORS CORP. 

6. Gently lift or pry the suspension upward then let it settle.  

7. The dial indicator reading should be no more than 2 mm (0.079 in). If the reading is out of specification, 

replace the ball joint.  

BALL JOINT INSPECTION (UPPER BALL JOINT) 

IMPORTANT: Do not pry between the lower arm and the wheel drive shaft boot or in 

such a manner that the ball joint seal is contacted. Damage to the wheel 
drive shaft boot will result (4WD).

 

2004 Hummer H2 

2004 SUSPENSION Suspension General Diagnosis - Hummer H2