This is tuned down a half step just like any other Alice in Chains song. It
Basically has three parts.
First part...the verse:
e|------------------------------|
b|------------------------------|
g|------------------------------|
d|----5----5----5----5--5-5|
a|--4----4----4----4---------|
e|0----0----0----0----4--3-|
that repeats over and over.
The next part is the pre-chorus type thing
e|---------------------------|
b|---------------------------|
g|---------------------------|
d|----5------------5-------|
a|--5--5--------5---5-----|
e|3------3-4-3-------3-4|
you get the Idea.
next is the Chorus type thing:
e|444446-8--|
b|444446-8--|
g|555557-9--|
d|666668-10|
a|666668-10|
e|444446-8--|
It repeats that for a while.
that's it....pretty easy.