Intro (Palm mute this)

E|------------------------------------|
B|------------------------------------|
G|------------------------------------|
D|------------------------------------|
A|--------1--3h5-3h5-3h5-3h5-3h5------|
E|-3-3-3-3-3--------------------------|

You basically play this through the whole song.
Do that slow upstroke sh** over and over.
Listen to song and hear how Brad Nowell plays it.

E|-3----------------------------------|
B|-3----------------------------------|
G|-3----------------------------------|
D|------------------------------------|
A|------------------------------------|
E|------------------------------------|

Then ocasionaly add (Palm mute)

E|-----------------------------------|
B|-----------------------------------|
G|-----------------------------------|
D|-----------------------------------|
A|------------3-1--------------------|
E|-3-3-3--1-1------------------------|