drop d tuning, i've put the times from the song to help with reading. sorry it's so simple, but it sounds good.
no bass for 3 seconds, then:
Intro (0:04)
G|-------------------------|
D|-------------------------|
A|-------------------------| x2
D|---0-00-0-00-0-00-0-00---|
Preverse (0:12)
G|---------------------------------|
D|---------------------------------|
A|---------------------------------| x2
E|---0-00-0-4-44-4-0-00-0-4-44-4---|
Verse (0:19)
G|---------------------|
D|---------------------|
A|---------------------| x4
E|---0000000000000-0---|
[ Tab from: https://www.guitartabs.cc/tabs/s/system_of_a_down/shimmy_btab.html ]
Chorus (0:38) play in a syncopated rhythm
G|----------------------|
D|----------------------|
A|----------------------| x2
E|---0-0/4-4\0-0/4-4\---|
Repeat verse here, x4 (0:47)
Repeat chorus here, x4 (1:06)
Bridge 1 (1:22)
G|--------------------------------|
D|--------------------------------|
A|--------------------------------| x1
E|---0--0--0--0--00-00-00-00-00---|
guitar solo, no bass starting at 1:30 for a few bars
Bridge 2 (1:34)
G|---------------------|
D|---------------------|
A|---5-6-5-3-2-1-0-----| x4
E|-----------------5---|
Outro (1:41)
G|----------------|
D|----------------|
A|----------------| repeat as necessary till end
E|---0000000000---|