[imidazol97]

[quote=ct91rs]Are you going to flush the system, or just add some coolant? If it's a '98 it probably came with Dex-cool QUOTE]

If you're doing it yourself...
I ran motor to mix all the crud. Turned it off. Took off lower radiator hose. Let drain and cool for nearly an hour.
Filled with plain hot tap water.
Ran for 8-10 minutes till circulated.
Drained again.
Cooled.
Filled with distilled water.
Ran.
Drained.
Cooled.
Filled with appropriate amount of DexCool.
Had to put some of DexCool into recovery tank because not enough empty volume was left when motor drained.

Added two pellets from GM dealer of antileak that GM recommends after flushing. Bag of 5 is like $1.75 If I recall correctly.

I have never used the block drain. Has anyone else had success finding it and using it to drain block?