Where did the Guts skill go? We removed it. It's important to some settings (and you'll find it as a Setting Rule when it is), but rare in others. Where it's rare, however, even a mighty barbarian has to spend valuable skill points to prove his mettle with the Guts skill, and that really doesn't make much sense.

In the core rules and most settings (especially fantasy and sci-fi) characters now use Spirit to resist the effects of Fear. If a character in a previously published setting has Guts, ignore it. If you're using a published adventure that requires a Guts roll, use Spirit instead.

In a few settings (primarily horrific ones, like Deadlands), Guts is a Setting Rule that reflects the particular nature of the game world and remains intact.

Savage Worlds Deluxe Edition p. 25