Tuned a full step down, standard.
Here's an idea of what he plays over the D chord during the verse:
--------------------------------------------------|
--------------------------------------------------|
-------7----------------7--7----------------------|
-------7--7----(7)---------7--7-----7----7-----7--|
--5----5-----------5-------5-----5----------5-----|
--x----x-------------------x-----x----------x-----|
[ Tab from: http://www.guitaretab.com/c/chad-vangaalen/324408.html ]
And here's the Emi:
--------------------------------------------------|
--------------------------------------------------|
--------------------------------------------------|
-(2)---2---5--4--2--------------4-----------------|
-(2)---2--------------5---0--2-(2)----------------|
--0----0-----------0------------0-----------------|
[Verse]
D Bmi A Emi
I laid my hand down on the tracks
D Bmi A Emi
My eyes just rolled on back
D Bmi A Emi
Sun– don't cry-
D Bmi A Emi
Sun, don't you hang so high
[Chorus]
G D A D
Last night I weighed my sin
G D A D
Last night I weighed my-
[Harmonica]
D D Bmi A Emi x2
[Verse 2]
I found my way back home
My head was buried underneath the stones
Sun- don't cry-
Sun, don't you hang so high
[Chorus]
Last night I weighed my sin
Last night I weighed my-