'99 GTP with sunroof and no onstar. I found several threads mentioning drain holes/channels and tubes. This link is an example, but no year is mentioned:
http://www.grandprixforums.net/sunroof-18511.html
I got in today after the car sat in the rain all morning to find water on my center console. The water is dripping from the overhead lights, above the windshield. Does anyone have detailed photos of the drain holes or photos of the drain tubes? I've never seen noticed them, but I guess I've never really looked for them, either. Help, please.