Hummer H2. Manual — part 2198

2003-04 SUSPENSION

Rear - H2

DESCRIPTION & OPERATION

All vehicles use a 5-link rear suspension consisting of the following components:

z

Upper And Lower Control Arms

z

Stabilizer Shaft

z

Shock Absorbers

z

Track Bar

z

Coil Springs

z

Air Springs

The ride control is provided by 2 identical direct dual-action shock absorbers that are angle-mounted between
the frame and the brackets, which are attached to the axle tubes.

To compensate for vehicle weight, the coil springs are different for the left and right sides. Do not interchange.

Coil spring or air spring suspensions are available. For more information on air spring components, refer to
Suspension.

REPAIR INSTRUCTIONS

REAR AXLE UPPER CONTROL ARM REPLACEMENT

Removal

1. Raise and support the vehicle.

2. Disconnect the air suspension level sensor (if equipped). Refer to Air Suspension.

3. Support the rear axle at the ride height.

4. Remove the upper control arm retaining nut and bolt from the frame bracket. See Fig. 1 .

2004 Hummer H2

2003-04 SUSPENSION Rear - H2

2004 Hummer H2

2003-04 SUSPENSION Rear - H2

Fig. 1: Removing Upper Control Arm Retaining Nut & Bolt From Frame Bracket
Courtesy of GENERAL MOTORS CORP.

5. Remove the upper control arm retaining nut and bolt from the axle bracket. See Fig. 2 .

2004 Hummer H2

2003-04 SUSPENSION Rear - H2

Fig. 2: Removing Upper Control Arm Retaining Nut & Bolt From Axle Bracket
Courtesy of GENERAL MOTORS CORP.

6. Remove the upper control arm.

Installation

1. Install the upper control arm.

2. Install the upper control arm retaining bolt and nut to the axle bracket. See Fig. 2 .

3. Install the upper control arm retaining bolt to the frame bracket. See Fig. 1 .

4.

Install the upper control arm to axle bolt and nut. Tighten the nut to 155 N.m (114 lb ft).

NOTE:

Do not tighten the nuts unless the suspension is at the curb height
position.

2004 Hummer H2

2003-04 SUSPENSION Rear - H2

5.

Install the upper control arm to frame bolt. Tighten the bolt to 155 N.m (114 lb ft).

6. Connect the air suspension level sensor (if equipped). Refer to Suspension.

7. Remove rear axle support.

8. Lower the vehicle.

REAR AXLE UPPER CONTROL ARM REPLACEMENT

Removal

1. Raise and support the vehicle.

2. Support the rear axle at curb height.

3. Remove the lower control arm retaining nuts. See Fig. 3 .

4. Remove the lower control arm retaining bolt.

NOTE:

Do not tighten the bolts unless the suspension is at the curb height
position.

2004 Hummer H2

2003-04 SUSPENSION Rear - H2