The recall involves 1997-2003 Regal GS and Grand Prix GTP models. GM strongly recommends that owners not park the cars in garages until the fix is made.
Source: Edmunds - Inside Line
Original Story: http://www.edmunds.com/insideline/do/News/articleId=125227
The two cars "apparently
The two cars "apparently have a problem with oil leaking onto the exhaust manifold under hard braking. If the oil makes it underneath the manifold's heat shield, it's possible that it could ignite a small flame which could spread to the spark plug covers.", based from autopartswarehouse.com blog.