Hummer H3. Manual — part 1245

SHOCK ABSORBER DISPOSAL

5. Remove the shock absorber. Refer to Shock Absorber Replacement.

1

Front Shock Absorber Lower Insulator
Tip:

Use J 21474-01 Control Arm Bushing Set to remove and install the
insulator.

The insulator design is shoulderless and can be driven through the lower
control arm too far in either direction. When installing the insulator,
make sure the insulator is centered in the lower control arm with equal
amounts protruding from each side of the arm when installed.

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.

2007 Hummer H3

2007 SUSPENSION Front Suspension - H3

2007 Hummer H3

2007 SUSPENSION Front Suspension - H3

Fig. 40: Drilling Hole In Shock Absorber At Centerpunched Locations
Courtesy of GENERAL MOTORS CORP.

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

centerpunch.

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:

Upper and lower control arms

Stabilizer shaft

Shock absorbers

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

2007 Hummer H3

2007 SUSPENSION Front Suspension - H3

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.

SPECIAL TOOLS AND EQUIPMENT

SPECIAL TOOLS

Special Tools

Illustration

Tool Number/Description

J 6627

Ball Joint Separator

2007 Hummer H3

2007 SUSPENSION Front Suspension - H3