gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Brake Proportioning/Combination Valve|Service and Repair|Page 11408 > < Brake Pipe Replacement|Page 11404
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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.

Brake Proportioning/Combination Valve|Service and Repair|Page 11408 > < Brake Pipe Replacement|Page 11404