For 1990-2009 cars

### Removal Procedure

1. Block the wheels.
2. Drain all of the air reservoirs. Refer to Draining Reservoirs .
3. Remove the air lines from the park control valve. Refer to Hose and Line Replacement - Nylon and Metal Compression .
4. Tag and label the air lines for the installation procedure.
5. Remove the pins.
6. Remove the knobs.
7. Remove the parking control valve nuts.
8. Remove the parking control valve.
9. Inspect the air lines for the following conditions:

• | Damage

• | Kinks

• | Wear

10. Repair or replace any damaged, kinked, or worn air lines.

### Installation Procedure

1. Install the parking control valve.

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.

2. Install the parking control valve nuts.

Tighten
Tighten the parking control valve nut to 6 N·m (53 lb in).

3. Install the knobs.
4. Install the pins.
5. Install the air lines to the parking control valve. Refer to Hose and Line Replacement - Nylon and Metal Compression .
6. Perform the air leakage test. Refer to Trailer Brake Control Valve Operational Check .
7. Perform the operational test. Refer to Trailer Brake Control Valve Leakage Test .
8. Remove the wheel blocks.