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.
Disconnect the vacuum hose from positive crankcase ventilation valve (2).
Remove the positive crankcase ventilation valve.
Fig 1: Disconnecting Vacuum Hose From Positive Crankcase Ventilation Valve