This is not the exact song but hopefully it gives you an idea on how to play it!!
There is a lot more hammer on's, pulloffs, slides etc to make it sound good but
these sound like the correct base notes.
Intro
G|------------------------------------------------------------------|
D|------10-10-10-12-14-14-12-12--------10-10-10-12-14-14-14-12------|
A|------------------------------------------------------------------|
E|------------------------------------------------------------------|
Verse
G|-------------------------------------------------------------------|
D|-------------------------------------------------------------------|
A|---7~--7--4~--4-5~---5----2--2~------------------------------------|
E|-------------------------------------------------------------------|
[ Tab from: https://www.guitartabs.cc/tabs/p/passenger/let_her_go_btab.html ]
G|-------------------------------------------------------------------|
D|-------------------------------------------------------------------|
A|---7~----7--4~---4-5~---5-5----------------------------------------|
E|-------------------------------------------------------------------|
Chorus
G|------------------------------------------------------------------|
D|------------------------------------------------------------------|
A|---3---3-----------5---5---/---7---7------------------------------|
E|------------3---3-------------------------------------------------|
G|------------------------------------------------------------------|
D|------------------------------------------------------------------|
A|---3---3-----------0--5---5-5-------------------------------------|
E|------------3---3-------------------------------------------------|
Outro
G|--------------------------------------------------------------------|
D|--------------------------------------------------------------------|
A|---3~--------------5~---------7~------3~----------------5~----------|
E|------------3~------------------------------------3~----------------|