WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
Install the positive crankcase ventilation valve (2).
Connect the vacuum hose to positive crankcase ventilation valve.
Fig 1: Connecting Vacuum Hose To Positive Crankcase Ventilation Valve