Express 1/2 Ton Van V6-4.3L VIN X (2003)
Brake Proportioning/Combination Valve: Service and Repair
Combination Valve Replacement
Removal Procedure
1. Raise the vehicle and properly support it with safety stands. Refer to Vehicle Lifting.
2. Disconnect the electrical connector from the combination valve.
3. Disconnect the front and rear brake pipes from the combination valve.
4. Remove the bolt holding the combination valve to the frame.
5. Remove the combination valve.
Installation Procedure
1. Install the combination valve to the frame.
Notice:
Refer to Fastener Notice in Service Precautions.
See: Service Precautions/Vehicle Damage Warnings/Fastener Notice
2. install the bolt to the combination valve and the frame.
Tighten the bolt to 10 Nm (88 inch lbs.).
3. Connect the front and rear brake pipes to the combination valve.
Tighten the brake pipe fittings to the combination valve to 30 Nm (22 ft. lbs.)
4. Connect the electrical connector to the combination valve.
5. Bleed the brake hydraulic system.
