Congratulations! You have had dexcool eat to you head gasket. Be sure and change that coolant out before 100k. Best to use some other type of coolant, I use walmart brand 8 BUX. Anyways, Go here,
http://www.justanswer.com/chevy/2khu...ratically.html, This seems to be the setup of my 3.1l, 1998. It should be pretty similiar, but Who knows. There is always a pesky vac line right below the coil pack that gets unplugged on mine, its pretty touch sometimes to get it plugged back in.
Im also sure a haynes or Chilton would have the vac diagram in the back of the book,