Cheat Code for Corvette in GTA 4?

There is no cheat code to spawn a Corvette specifically in Grand Theft Auto IV.

The game offers only two vehicle spawn cheats:

• "FUGGIT" – Spawns a random car.
• "ROCKSTAR" – Spawns a random car with a nitro boost.

Neither guarantees a Corvette. To get one, you must find it in the game world.