The newer ones (E and F) use the GE F414G.

https://en.wikipedia.org/wiki/Volvo_RM12

That’s the engine of the Grippen.

Then why the US can veto it’s sell to Colombia?

It’s a General Electric F404 license.

There’s a problem with the engine. It’s an US design and the US just blocked a sell to Colombia. I think Saab should make another design with the Typhoon engine or some other European engine that has roughly the same size and push.