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