There's a little diddy in the beginning, while the drum and bass are setting the tone for the song:
e|----------------------8-7p5-----5------------------------------------------------|
B|----------------------------5-8--------------------------------------------------|
G|--------9---7--------------------------------------------------------------------|
D|--------7---5--------------------------------------------------------------------|
A|---------------------------------------------------------------------------------|
E|---------------------------------------------------------------------------------|
There's a bunch of ways you can play the next part, but I like to play the first several notes on
the first string, so there's no other notes ringing (you can mute the strings, or do it this way,
your choice)
[ Tab from: https://www.guitartabs.cc/tabs/t/tom_petty/break_down_tab_ver_3.html ]
(Play this part twice...gotta be quick and clean on the turnaround)
e|---------------------------------------------------------------------------------||
B|----------------------------------------------10--8---------9-7---7-7p5---------.||
G|-----14-12-14-\9-9-7-9-\2-2-0-2----------------9--7-(9)-----7-5--------7---------||
D|---------------------------------2----------------------------------------------.||
A|---------------------------------------------------------------------------------||
E|---------------------------------------------------------------------------------||
Chords are Easy, you can figure em out, starts with a A and G minor. You blues scale only guys
(and you know who you are, I see you out there all the time), this is a great song to solo
over using 'A Dorian Minor'...fits great, over the solo chords...give it a shot, expand your horizons.