Do gta online vehicles appear in gta v story mode?

The verified evidence from Wikipedia focuses on the development history and release timeline of Grand Theft Auto V, including details about the development team size, collaboration between Rockstar studios, and platform release dates. It does not discuss in-game content such as vehicles, their distribution between modes, or specific features like GTA Online-exclusive vehicles. Without explicit information about vehicle availability in story mode from the provided source, no definitive conclusion can be drawn about whether GTA Online vehicles appear in the single-player campaign.