G    320033
C/G  332010
Em   022000
Am   x02210

There's a bass run on the 4th beat of every Am bar - 3rd fret A string then open D.

A few ideas for making things a little more interesting.
To pick up on the keyboard line, try playing G6: 320030 instead of (or over, if 2 guitars) the G 
at the start of the lines, after the Intro.
In the bridge, you could substitute the G & Am for power chords of G: 355xxx & A5: 577xxx


[Intro]
G    G    G    G
                 two, three, four
G    C/G  G    Em   Am (x2)

[Verse 1]
         G                                       C/G                 G
Well the drums rolled off in my forehead and the guns went off in my chest
         Em                              Am
Remember carrying the baby just for you, crying in the wilderness

[Verse 2]
       G                                     C/G            G
I lost track of my friends, I lost my kin, I cut them off as limbs
  Em                           Am
I drove out over the flatlands hunting down you and him

[Verse 3]
    G                         C/G             G
The sky was big and empty, my chest filled to explode
  Em                                      Am
I yelled my insides out at the sun at the wide open road

[Chorus]
       G
It's a wide open road
       C/G       G      Em    Am
It's a wide open road

[Verse 4]
G                            C/G             G
So how do you think it feels sleeping by yourself?
         Em                             Am
When the one you love, the one you love is with someone else

[Chorus]
            G                      C/G       G
Then it's a wide open road, It's a wide open road
    Em                       Am
And now you can go any place that you want to go

[Bridge]
  G                               G
I wake up in the morning thinking I'm still by your side
G                             Am
I reach out just to touch you then I realise

[Chorus]
       G                      C/G       G     Em    Am
It's a wide open road, It's a wide open road

[Verse 5]
G                            C/G             G
So how do you think it feels sleeping by yourself?
                                         (sleeping by yourself)
         Em                             Am
When the one you love, the one you love is with someone else

[Bridge]
  G                               G
I wake up in the morning thinking I'm still by your side
                          (It’s a wide open road)
        G                                 Am
      I reach out just to touch you,      then I realise
(It’s a wide open road)           (It’s a wide open road)

[Chorus]
       G                      C/G       G
It's a wide open road, It's a wide open road
       Em                     Am
It's a wide open road, It's a wide open road
(Repeat)
       G                      C/G       G
It's a wide open road, It's a wide open road
    Em                       Am
And now you can go any place that you want to go