That "stop leak" stuff does not work at all. For about a month or two it may stop it, but all those stop leak products do are make the existing shot gasket swell a bit. With 45K on it.. I can beleive you are having this problem. I;d go to the stealership and speak with them... a 2000 with 45K.. that only 9000 miels a year. I bet the dealership would warranty it.. or go 50/50 on it.

2006 Pontiac G6 3900SFI GTP Coupe CAI, Stainless Cat Back, Vector Tune, Strut Brace, Eibach Pro Kit, Custom Made Projector Headlights, 4300K, 20% Tint Former Owner- 2000 "Stryped" CSVT CEG Dragon Run- Oct 13-15