I'm voting everyone that said LIM gaskets would go buy an NA car and learn what happens. LIM's don't hydrolock motors. UIM's do.
Carilyn, Please read this and print this out for the person that does work on your car.
http://www.grandprixforums.net/97-03...ure-60667.html
If you have a car buddy or a friend that's willing to help you take off the air tube intake and or the throttle body, this can be quickly confirmed as a bad upper intake manifold. If that's the case, it's a pretty simple fix usually. What you said about how it happened is the exact scenario that typically occurs.
