Chords used:
(G)  (D)  (C)  (Am7)
-3-  -X-  -X-   -5-
-5-  -5-  -3-   -7-
-5-  -7-  -5-   -5-       
-4-  -7-  -5-   -5-
-3-  -7-  -5-   -8-
-3-  -5-  -3-   -5-


Intro: G, D, C x2


Verse 1:

G        D                      Am7  
   Momma take this badge off of me

G          D            Am7
   I can?t use it any more

G              D                Am7
   Its getting dark to dark to see

G            D                     Am7
   I feel im knocking on heavens door


Chorus:

G                D                     Am7
   Knock, knock, knocking on heavens door

G                D                     C
   Knock, knock, knocking on heavens door

G                D                     Am7
   Knock, knock, knocking on heavens door

G                D                     C
   Knock, knock, knocking on heavens door


Verse 2:

G        D                      Am7
   Momma put my guns in the ground

G         D               Am7
   I cant shoot them anymore

G            D                     Am7
   That long black clouds coming down

G            D                     Am7
   I feel im knocking on heavens door


Repeat chorus and fade out