No offense but the tab I saw on here for this didn't sound right to me at all so
here's my shot at it. The capo 4 and chords sounded fine, just the intro.
Capo 4
[ Tab from: http://www.guitaretab.com/g/george-strait/209813.html ]
e--------------------3-----------------|
b-1/3--3-------------3-----------------|
g-2/4----4---2---0---0-----------------|
d--------------------0-----------------|
a--------------------2-----------------|
E--------------------3-----------------|
Continue with G,Em,C, Chord progression with a few hammer on's on the G and C.
Listen to the song for rythem. hope this helps
~Ben