Battery drained

[Tom Robinson]

My battery was drained while sitting for 6 hours what could have killed the battery and the alternator is god the starter is good

[CamGTP]

Your guess is as good as mine without doing some testing with a multi-meter to test all the different circuits.

[carkhz316]

Firstly, how old is the battery? I would charge and have the battery load tested and your charging system checked and proceed from there. If the dead battery happened suddenly, then you likely have a parasitic drain somewhere, though that quickly would point towards something large, like a dome light or the like.