Hummer H2. Manual - part 2185

SUSPENSION BOTTOMS 

Suspension Bottoms 

6

z

Stabilizer Shaft Replacement in Front 
Suspension  

z

Stabilizer Shaft Link Replacement in Rear 
Suspension  

 
Did you complete the repair?

Go to 

Step 7

-

7

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

System 

OK

Go to Step 3

Step

Action

Yes

No

DEFINITION: A loud bang or thump that can usually be felt and/or heard when the vehicle is driven 
over bumps. This condition is commonly noticed when the vehicle trim height is too low.

1

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

Go to 

Step 2

Go to Symptoms - 

Suspension General 

Diagnosis

2

Verify that the suspension bottoms. 
Does the vehicle operate normally?

System 

OK

Go to Step 3

3

Check for vehicle overloading and correct the overloading 
condition as necessary. Refer to Label - Vehicle Certification 
(w/o RPO Z49) or Label - Vehicle Certification (w/RPO Z49) in 
General Information. 
Did you find and correct the condition?

Go to 

Step 6

Go to Step 4

4

Inspect the following components for damage or wear and repair as 
necessary: 

z

Shock absorbers, refer to Struts or Shock Absorbers On-
Vehicle Testing .  

z

Coil springs and torsion bars refer to Torsion Bar 
Replacement in Front Suspension, Coil Spring 
Replacement in Rear Suspension, or Air Spring 
Replacement in Air Suspension.  

 
Did you find and correct the condition?

Go to 

Step 6

Go to Step 5

5

Inspect the vehicle trim height. Refer to Trim Height Inspection 
Procedure . 
Did you complete the trim height inspection procedure?

Go to 

Step 6

-

6

Operate the vehicle 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

  

MEMORY STEER 

Memory Steer 

Step

Action

Yes

No

DEFINITION: The steering wheel does not return to center after completing a turn.

1

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

Go to 

Step 2

Go to Symptoms - 

Suspension General 

Diagnosis

2

Verify that memory steer is present. 
Does the system operate normally?

System 

OK

Go to Step 3

3

Check the tire inflation and adjust to specifications. Refer to 
Tire Inflation Pressure Specifications in Maintenance and 
Lubrication. 
Did you adjust the tire pressure?

Go to 

Step 13

Go to Step 4

4

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

Jacking the Vehicle in General Information.  

2. Lubricate the tie rod ends and the ball joints if 

applicable.  

3. Inspect the suspension system for worn or damaged 

components.  

4. Repair as necessary.  

Did you find and correct the condition?

Go to 

Step 13

Go to Step 5

5

1. Rotate the steering wheel ONE revolution in both 

directions.  

2. Rotate the steering wheel back to the original position.  

Was the steering wheel abnormally difficult to rotate in either 
direction?

Go to 

Step 6

Go to Step 9

6

1. Remove the steering column pinch bolt in order to 

disengage the column from the steering system. 

2. Note the position of the steering wheel and rotate the 

steering wheel ONE revolution in both directions.  

3. Rotate the steering wheel back to the original position.  

Was the steering wheel abnormally difficult to rotate in either 
direction?

IMPORTANT:

Do NOT rotate the steering wheel more than one 
complete revolution.

Go to 

Step 12

Go to Step 7

1. Remove the front tire and wheel assemblies. Refer to 

 

2004 Hummer H2 

2004 SUSPENSION Suspension General Diagnosis - Hummer H2

  

POOR DIRECTIONAL STABILITY 

Poor Directional Stability 

7

Tire and Wheel Removal and Installation in Tires and 
Wheels.  

2. Disconnect both of the outer tie rod ends from the 

steering knuckles. Refer to Tie Rod Replacement - 
Outer in Power Steering System.  

3. Use your hands in order to move the tie rod ends.  

Are either of the tie rod ends abnormally difficult to move?

Go to 

Step 10

Go to Step 8

8

Inspect for binding ball joints. Use your hands to push and pull 
the steering knuckle inboard and outboard. 
Are either of the steering knuckles abnormally difficult to 
move?

Go to 

Step 11

Go to Step 9

9

Inspect the wheel alignment and adjust as necessary. Refer to 
Wheel Alignment Specifications in Wheel Alignment. 
Did you complete the wheel alignment?

Go to 

Step 13

-

10

Replace the outer tie rod end. Refer to Tie Rod Replacement 
- Outer or Tie Rod Replacement - Inner in Power Steering 
System. 
Did you complete the repair?

Go to 

Step 13

-

11

Replace the damaged ball joint. Refer to Upper Control Arm 
Replacement or Lower Ball Joint Replacement in Front 
Suspension. 
Did you complete the repair?

Go to 

Step 13

-

12

Repair the steering column as necessary. Refer to Steering 
Column Replacement in Steering Wheel and Column. 
Did you complete the repair?

Go to 

Step 13

-

13

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

System 

OK

Go to Step 3

Step

Action

Yes

No

DEFINITION: Driver is unable to maintain consistent, predictable vehicle driving control in any 
direction.

1

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

Go to 

Step 2

Go to Symptoms - 

Suspension General 

Diagnosis

2

Verify that the directional stability is poor. 
Does the system operate normally?

System 

OK

Go to Step 3

Inspect the front stabilizer for the following conditions: 

z

Stabilizer fasteners for looseness. Refer to Fastener 
Tightening Specifications in Front Suspension.  

 

2004 Hummer H2 

2004 SUSPENSION Suspension General Diagnosis - Hummer H2

  

NOISE DIAGNOSIS - FRONT SUSPENSION 

Noise Diagnosis - Front Suspension 

3

z

Damaged stabilizer bar, stabilizer bushings, or damaged 
and missing stabilizer links. Refer to Stabilizer Shaft 
Replacement in Front Suspension.  

 
Did you find and correct the condition?

Go to 

Step 10

Go to Step 4

4

Inspect the following suspension and steering components for 
wear or damage: 

z

Control Arms, refer to Upper Control Arm 
Replacement or Lower Control Arm Replacement in 
Front Suspension.  

z

Ball Joints, refer to Lower Ball Joint Replacement .  

z

Inner and outer tie rod ends, refer to Tie Rod 
Replacement - Outer or Tie Rod Replacement - Inner 
In Steering Linkage.  

 
Did you find and correct the condition?

Go to 

Step 10

Go to Step 5

5

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

Go to 

Step 10

Go to Step 6

6

Inspect the vehicle trim height. Refer to Trim Height 
Inspection Procedure . 
Did you find and correct the condition?

Go to 

Step 10

Go to Step 7

7

Inspect the steering column for looseness. Refer to Looseness 
in Steering Column in Steering Wheel and Column. 
Did you find and correct the condition?

Go to 

Step 10

Go to Step 8

8

Inspect the steering gear for the following conditions: 
Steering gear mounting bolts for looseness. Refer to Fastener 
Tightening Specifications in Power Steering. 
Did you find and correct the condition?

Go to 

Step 10

Go to Step 9

9

Inspect and adjust the wheel alignment as necessary. Refer to 
Wheel Alignment Specifications in Wheel Alignment. 
Did you complete the alignment?

Go to 

Step 10

-

10

Operate the vehicle 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 front of the vehicle that is induced by VEHICLE SPEED or 
DRIVING TERRAIN as related to the front suspension.

 

2004 Hummer H2 

2004 SUSPENSION Suspension General Diagnosis - Hummer H2