There is no cheat for a sub marine. But if you have the PC version of Grand Theft Auto San Andreas you can download a mod for a submarine.
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If you wanted GTA: San Andreas cheat codes, suggest you have a look at this site:www.psxextreme.com
type the cheat: ilikedressingup until you get what you are looking for.
there is none, but their is a health cheat and an armor cheat.
there is no cheat for that in san Andreas , you have to mod your game