Hummer H2. Manual - part 2183

5. Install the nut to the tennon end. Do not tighten the nut.  

6. Support the lower control arm at curb height.  

7. Hold the tennon end with a wrench while torquing the nut. 

Tighten: Tighten the nut to 20 N.m (15 lb ft). 

8. Lower the vehicle.  

SHOCK ABSORBER DISPOSAL 

1. Make an indentation 10 mm (0.4 in) from the bottom (4) of the tube (3) using a centerpunch. 

CAUTION: Gas charged shock absorbers contain high pressure gas. Do not remove 

the snap ring from inside the top of the tube. If the snap ring is removed, 
the contents of the shock absorber will come out with extreme force which 
may result in personal injury.

CAUTION: To prevent personal injury, wear safety glasses when centerpunching and 

drilling the shock absorber. Use care not to puncture the shock absorber 
tube with the centerpunch.

 

2004 Hummer H2 

2004 SUSPENSION Front Suspension - Hummer H2

  

 

2004 Hummer H2 

2004 SUSPENSION Front Suspension - Hummer H2

  

Fig. 37: Making Indentation 10 mm (0.4 in) From Bottom Of Tube
Courtesy of GENERAL MOTORS CORP. 

2. Clamp the shock absorber in a vise horizontally with the shock absorber rod (1) completely extended.  

3. Drill a hole in the shock absorber at the centerpunch (4) using a 5 mm (3/16 in) drill bit. Gas or a gas/oil 

mixture will exhaust when the drill bit penetrates the shock absorber. Use shop towels in order to contain 
the escaping oil.  

4. Make an indentation in the middle (2) of the tube (3) with a centerpunch.  

5. Drill a second hole in the shock absorber at the centerpunch (2) using a 5 mm (3/16 in) drill bit. Oil will 

exhaust when the drill bit penetrates the shock absorber. Use shop towels in order to contain the escaping 
oil.  

6. Remove the shock absorber from the vise. Hold the shock absorber over a drain pan horizontally with the 

holes down. Move the rod (1) in and out of the tube (3) to completely drain the oil from the shock 
absorber.  

DESCRIPTION AND OPERATION 

GENERAL DESCRIPTION 

All models have a front suspension that consists of the following components: 

z

Upper and lower control arms  

z

Stabilizer shaft  

z

Shock absorbers  

z

Torsion bars (right and left side)  

The stabilizer shaft controls the side roll of the vehicle. This shaft is mounted in rubber insulators that are held 
to the frame with a bracket. The ends of the stabilizer shaft connect to the lower control arms with insulator 
assemblies. 

The upper ball stud assembly is press fit into the upper control arm. The assembly attaches to the steering 
knuckle with a prevailing torque nut. 

The upper ball studs are not replaceable. 

The lower ball stud assembly is pressed into the outer end of the lower control arm. A prevailing torque nut 
joins the steering knuckle to the lower ball stud. 

The upper and the lower control arms have pressed-in bushings. The bolts pass through the bushings and join 
the arms to the frame. 

All ball studs have grease fittings. 

All front wheel bearings are sealed. These bearings are pre-adjusted and need no lubrication. 

 

2004 Hummer H2 

2004 SUSPENSION Front Suspension - Hummer H2

  

SPECIAL TOOLS AND EQUIPMENT

SPECIAL TOOLS 

Special Tools 

Illustration

Tool Number/Description

J 36202 

Torsion Bar Loading/Unloading Tool

J 43631 

Ball Joint Remover

J 45851 

Ball Joint Separator Protector Adaptors

 

2004 Hummer H2 

2004 SUSPENSION Front Suspension - Hummer H2