1998 Silhouette Freeze Plugs

My 1998 Olds Silhouette with 3.4L Engine is shooting water out somewhere from the block/heads under the front heat shield. Are there freeze/expansion plugs located under there that may have blown or rotten out? My Haynes manuals says nothing about freeze plugs.

Note: There is no signs of antifreeze in the oil when I checked the dip stick.

The 3.4 has a common and annoying history of failed intake manifold gasket . I'd be surprised if it were anything else....
There is a "sticky" at the top of this forum.....well here is the link
http://www.d-tips.com/general/articles/article.aspx?id=2