1. Disconnect the vacuum hose connector from the power brake unit while pressing the tabs of the vacuum hose connector.
2. Detach the clip using pliers and disconnect the vacuum hose from the intake manifold. (Z6)
3. Insert a thin flathead screwdriver at the point indicated by the arrow in the figure, push the ring down and disconnect the vacuum hose from the intake manifold. (LF)
4. Remove the vacuum hose.
5. Install in the reverse order of removal.
6. Verify that the vacuum hose is inserted so that the vacuum hose joint contacts the intake manifold ring. (LF)
7. Insert the vacuum hose connector to the power brake unit.
8. Verify that the vacuum hose is firmly installed by pulling it, and push it into the power brake unit again.
9. Verify that the power brake unit spool is in the vacuum hose connector.
