The Saturn Astra had several radiator fan schemes.

Apparently, 3 different fan motors were sold. And the wiring varied a lot

I think the cars with AC and Auto transmissions had 2 fans installed. Maybe all other vairants had only 1 fan installed? I'm not 100% sure.

Check part numbers with your Chevy dealer using VIN numbers to confirm fitment.

***Theory of operation, old part numbers, electrical diagrams
https://charm.li/Saturn/2008/Astra%2...d%20Operation/

https://charm.li/Saturn/2008/Astra%2...20Information/

https://charm.li/Saturn/2008/Astra%2...al%20Diagrams/