Intro/Verse (0:06)
It's a bass riff, but play the bass part on your guitar like this
e---------|----------|----------|---------------------------|
B---------|----------|----------|---------------------------|
G---------|----------|----------|---------------------------|
D---------|----------|----------|---------------------------|
A----5----|-----7----|----5-----|-------5--7-7b8r7--5-------|
E-7----5--|--7----5--|-7----5---|-7---7---------------5--7--|
This is also the verse, minus the little 7b8r7
Then Davey does a little lead lick (0:38)
e-10---7-7---9b10r9--7-|
B-10---7-7---9b10r9--7-|
G----------------------|
D----------------------|
A----------------------|
E----------------------|
[ Tab from: http://www.guitaretab.com/y/you-am-i/263498.html ]
Back to intro verse Riff once more, then
Chorus (0:48)
D G B Em
D G B C
Then play the verse lick from (1:05) to (1:38) then repeat the Chorus
Solo (1:55)
e-------7------------------------|
B-7--10--------------------------|
G------------9b10r9--7----7--9---|
D----------------------9---------|
A--------------------------------|
E--------------------------------|x3
e-------7-----9b10(and hold)
B-7--10----------|
G----------------|
D----------------|
A----------------|
E----------------|
Repeat these two measures and that's the solo.
At (2:28) go back to the Chorus.
At (3:04) go back to playing intro/verse riff until fade.
That's it.