There are three places on top of the gas tank that could be leaking. The fuel filler inlet, the fuel gauge sender, and the fuel pump. All three can be seen easily by simply removing the panel under the spare tire. If the tank is full enough for fuel to puddle under the car, it should be easy to spot the leak. You can probably solve it by tightening the offending connection. My bet is that it's the big clamp around your fuel pump (requires a screwdriver), though it might be the fuel gauge sender (requires strong fingers). It's very unlikely that you need any parts, but even if you do it'll probably just be a new clamp. You should get on this immediately. A dangerous fuel leak that's easy to repair should be the very top of anybody's priority list. - Mike Substelny VIN 01280 8 years.