This kid that my son is friends with just bought a '97 DeVille with the North*..I think I posted his pic..anyhoo...his check engine light came on & the dealer he got if from said to take it to Auto Zone and get it checked by computer..so it came up that he had water in teh gas tank..or so they say, anyone ever hear of this? If it does have water in the tank..what can be done to fix it? Any ideas? Thanks in advance!!