I transcribed this tab using a live video of the band playing in DC in '91.
Admittedly, I skimped a bit on tabbing every little nuance (Duane has a
tendency to change the riffs a lot throughout the song), but from what I
have here, you should be able to figure out the little changes.  I'm not
100% on Riff 3 or on the Chorus, but hopefully it's correct or someone will
correct it.

Riff 1 is a doosey, and might be better played on the G and B strings, but
Duance definitely plays it on the top two strings.  Riff 2 is definitely
correct, but I still haven't mastered it yet.

Intro:

Riff 1:

e|-7--7--7--7--7--7--7--7--7--7--7--7--7--7\\9--9--|
B|-12-12-12-12-12-12-12-12-12-12-12-12-12-12\14-14-|
G|-------------------------------------------------|
D|-------------------------------------------------|
A|-------------------------------------------------|
E|-------------------------------------------------|

e|\10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-10-|
B|\15-15-15-15-15-15-15-15-15-15-15-15-15-15-15-15-|
G|-------------------------------------------------|
D|-------------------------------------------------|
A|-------------------------------------------------|
E|-------------------------------------------------|

e|-6--6--6--6--6--6--6--6--6--6--6--6--6--6\\8--8--|
B|-11-11-11-11-11-11-11-11-11-11-11-11-11-11\13-13-|
G|-------------------------------------------------|
D|-------------------------------------------------|
A|-------------------------------------------------|
E|-------------------------------------------------|

e|\9--9--9--9--9--9--9--9--9--9--9--9--9--9--9--9--|
B|\14-14-14-14-14-14-14-14-14-14-14-14-14-14-14-14-|
G|-------------------------------------------------|
D|-------------------------------------------------|
A|-------------------------------------------------|
E|-------------------------------------------------|

Riff 2:

e|----------------|
B|----------------|
G|----------------|
D|-8\10----8\10---|
A|-8\10----8\10---|
E|-6\8-----6\8----|

e|-------------------------------------------------------------------------|
B|----------------14/13-------------14/13-------------14/13-------------14-|
G|-------15/14-------------15/14-------------15/14-------------15/14-------|
D|-------------------------------------------------------------------------|
A|-12\13----12\13----12\13----12\13----12\13----12\13----12\13----12\13----|
E|-------------------------------------------------------------------------|

Riff 3:

e|-------------11----11----------------11----11----|
B|-------------11----11----------------11----11----|
G|-12-12-12-12-12-12-12-12-12-12-12-12-12-12-12-12-|
D|-14-14-14-14-14-14-14-14-14-14-14-14-14-14-14-14-|
A|-13-13-13-13-13-13-13-13-13-13-13-13-13-13-13-13-|
E|-------------------------------------------------|

e|-------------11----11----------------11----11----|
B|-------------11----11----------------11----11----|
G|-12-12-12-12-12-12-12-12-12-12-12-12-12-12-12-12-|
D|-14-14-14-14-14-14-14-14-14-14-14-14-14-14-14-14-|
A|-13-13-13-13-13-13-13-13-13-13-13-13-13-13-13-13-|
E|-------------------------------------------------|

e|-------11----------11----------11----------11----|
B|-------11----------11----------11----------11----|
G|-12-12-12-12-12-12-12-12-12-12-12-12-12-12-12-12-|
D|-14-14-14-14-14-14-14-14-14-14-14-14-14-14-14-14-|
A|-13-13-13-13-13-13-13-13-13-13-13-13-13-13-13-13-|
E|-------------------------------------------------|

e|-11----11----------11----11----11----11-11-11-11-|-11/---|
B|-11----11----------11----11----11----11-11-11-11-|-11/---|
G|-12-12-12-12-12-12-12-12-12-12-12-12-12-12-12-12-|-12/---|
D|-14-14-14-14-14-14-14-14-14-14-14-14-14-14-14-14-|-14/---|
A|-13-13-13-13-13-13-13-13-13-13-13-13-13-13-13-13-|-13/---|
E|-------------------------------------------------|-------|

Verse:

e|-----------------|
B|-----------------|
G|-----------------|
D|-----------------|
A|-----------------|
E|-3p0-5p0-6p0-3p0-|
p.m................

Chorus:

e|-----------------------|
B|-------------------8/--|
G|-5---5-5---5-5/----8/--|
D|-8---8-8---8-8/--------|
A|-7---7-7---7-7/--------|
E|-6---6-6---6-6/--------|

Last Chorus:

e|-----------------|
B|-----------------|
G|-----------------|
D|-----------------|
A|-----------------|
E|-3p0-5p0-6p0-3p0-|

Song order:
(No guitar 1st 4 measures)
Riff 1 x2
Riff 2 x1
Riff 1 x2
Riff 3 x1
(No guitar on the first half of the verse 12 measures)
Verse x16
Chorus x4
Riff 2 x1
Riff 1 x2
Riff 3 x1
Verse x12
Last Chorus x12
End on E5