For 1990-2009 cars

### Removal Procedure

1. Block the wheels of the axle.
2. Remove the locknuts (2, 3) and the washer that connects the height control valve link (5) to the valve (1).
3. Remove the height control valve link (5) from the control valve (1).
4. Drain the air pressure from the air springs.
5. Raise the frame of the vehicle in order to remove the load from the suspension.
6. Support the frame using jack stands.
7. Remove the locknut (3) and the washer that connect the air spring (1) to the cross channel (2) and to both of the main support beams.
8. Raise the cross channel using jacks, if required.

### Installation Procedure

1. Connect the cross channel (2) to both of the air springs (1).
2. Lower the frame.
3. Pilot the bolt holes onto the main support beam.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Install the washers and the locknuts (4) that connect the cross channel (1) to the main support beam (3).

Tighten
Tighten the locknuts in 37 N·m (50 lb ft) increments to 330 N·m (243 lb ft).

5. Refill the system with air.
6. Unblock the wheels.