there is non, there is for san andreas but not for vice city, dont forget in San Andreas you can swim Vice city you cant
the cheat for floating on water is seaways ,if you type it the cars and helicopters will float.
There is no cheat code for cars fly on the water on PSP ok
Use the "Cars can float on water" cheat (find it on the internet or cheat book). Then drive into the sea and drive across the sea. If you don't have the "Better driving skills" cheat you may find it a little bit harder to get out the sea. Do that or do loads of missions.
There is a cheat that makes all cars able to drive on water (Motorbikes and bikes don't work! only cars work with this cheat) Right,R2,circle,R1,L2,square,R1,R2. (P.S. This cheat will only work in GTA SA ps2.)
cheat-SEAWAYS
There is no cheat code to have cars float on water in the PC version of Grand Theft Auto 3. The only way to get the feature in the game is by modifying the game's files.
seaways
You should have mentioned the platform you are playing on but on usual people play on a pc.So The cheat code to drive cars on the water is 'seaways'.Type the code during the game play and then directly drive car into the water.
The cheat is 28740 to unlock the cars.
Use the cheat seaways but remember only cars float, bikes don't.
Yes you can drive cars in the game on water.You need to type the cheat for floating cars on water.
the cheat is simple COMEFLYWITHME