I've got a riddle...

[twalker920]

Loose or corroded battery terminals would allow a small amount of current through (it's still a conductor, just a very high resistance one)...say, enough to light up the dash. But it wouldn't allow the cranking amps through to turn the starter. So that's one possibility.

But to go that dead that fast I would agree with the fuse and/or interlock switches.

Hope you figure it out!

[Y33TREKker]

Was anyone available to try jump starting it? Maybe a light got left on and the battery just got drained during those hours you were gone?

[Zu4two]

Any noise or clicking sound around the center console when turning the key? If so, it might be the shifter interlock or a bad starter relay in the engine bay fusebox.