This basically a riff of D  where the bass walks the open D string, the C on the A 
string and then the open A string) with a long G chord on Peace in Peacemaker
From their Live at The Station Inn album (gigs only sales)
the 2nd D in the riff comes immediately after the last word in each line

you can approximate the sound by playing the chords shown below
thanks to woof for the feedback.(give him kudos)


      D          C               Am               Am       D     C    Am    Am
I'm a cool three pounds of cold blue steel
      D          C               Am               Am       D     C    Am    Am
I shoot even better than the way I feel
made to fit right in your hand
why i'll never understand

I coulda been a hammer or a railroad spike
I coulda been a train rollin through the night
but they gave my voice such a terrible sound
that I wish they'd left me in the ground

         G
I'm a peacemaker
D          C         Am        Am       D     C    Am    Am
           don't know how I got my name
      G
I'm a peacemaker
      A
if I don't deserve the credit
       C                          D          C         Am        Am
why do I deserve the blame


When the lion lays down with the lamb
then you won't find me in nobody's hand
till that time I will remain
till the sinners lay down with the saints


I'm a peacemaker
don't know how I got my name
I'm a peacemaker
if I don't deserve the credit
why do I deserve the blame


I'm a peacemaker
don't know how I got my name
I'm a peacemaker
if I don't deserve the credit
why do I deserve the blame

I'm a cool three pounds of cold blue steel
I shoot even better than the way I feel