I don't think so. He says it's an '04, my '99 Northstar was spec'd for dexcool. I suppose that different engines may not have had dex in them at the time, but it was being used by GM at that time, particularly for aluminum block engines, and probably universally.
And before I get flamed too badly on my original statement, my info came directly from the former Northstar engineer that frequented this board for a bit. If the engine was spec'd for dexcool, changing to "silicate" containing coolant will cause premature WP seal wear....and you can't flush it out.