Well, this is how I play it, in G. I'm more familiar with the version that John Cale did on the I'm Your fan tribute, which was in C, but that's too much of a pain in the ass for me. Transpose it down a fifth if you wish.
Now I C C/B Am that David played and it pleased the Lord
But you don't really care for music do ya
It goes like this the fourth the fifth
the minor fall and the major lift
The baffled king composing hallelujah
Hallelujah, Hallelujah, Hallelujah, Hallelujah
Your faith was strong but you needed proof You saw her bathing on the roof Her beauty and the moonlight overthrew ya She tied you to a kitchen chair She broke your throne, and she cut your hair And from your lips she drew the Hallelujah
Hallelujah, Hallelujah, Hallelujah, Hallelujah
You say I took the name in vain I don't even know the name But if I did, well really, what's it to ya? There's a blaze of light in every word It doesn't matter which you heard The holy or the broken Hallelujah
Hallelujah, Hallelujah, Hallelujah, Hallelujah
I did my best, it wasn't much I couldn't feel, so I tried to touch I've told the truth, I didn't come to fool ya And even though it all went wrong I'll stand before the Lord of Song With nothing on my tongue but Hallelujah