Master Cylinder Proportioning Valves: Removal

1. Raise and suitably support the vehicle.
2. Clean the dirt and foreign material from the brake pipes and proportioning valves. See Fig 1 for exploded view of proportioning valves.
3. Disconnect the brake pipe fittings from the proportioning valve using a backup wrench.
4. Remove the proportioning valves (1).

Fig 1: Exploded View Of Master Cylinder Proportioning Valves

Courtesy of GENERAL MOTORS CORP.