What is the song in G.I. Joe trailer?

The song used in the G.I. Joe trailer you're referring to is most likely "War Pigs" by Black Sabbath. This song has been featured in several trailers, and the heavy metal vibe perfectly fits the action-packed tone of the G.I. Joe franchise.

However, there are many different trailers for G.I. Joe movies, and it's possible you are thinking of a different one that used a different song.

To be more specific, could you tell me which G.I. Joe trailer you're asking about?

For example:

* The G.I. Joe: The Rise of Cobra (2009) trailer

* The G.I. Joe: Retaliation (2013) trailer

* A trailer for the upcoming G.I. Joe movie (if there is one)

Once you provide more details, I can help you identify the exact song used.