The key might not be right but these are the chords I play. They work for singing along.
[Verse 1]
G Em
Cardinal crashed into my window, I think he might die
C
I'll plan him a funeral, I'll read his last rites
D
'Cause I know what he saw in that reflection of light
On the glass was a better life
[Verse 2]
G
Staring at a hole in your chest
Em
That's been dug there for decades
American broken promises
C
Caught between the lies you've been fed
D
And a war with your bloodstream
G Em C
I should have been there when you needed a friend
D G Em C D G Em C
I was off on my own a---gai-n
D G Em C D
Selfish and stupid
[Chorus]
G
So if you call me back or let me in
Em
I swear I'll never let you down again
G
I know the devil you've been fighting with
Em
I swear I'll never let you down again
[Verse 3]
G
I had that nightmare again
Em
You're seven and helpless, angry as hell
C
And you balled up your fists but I laughed at your swings
D
And I beat you half-conscious
G Em C
I know that I failed you, woke up in a sweat
D G Em C D
I want those years back
[Chorus]
G
So if you call me back or let me in
Em
I swear I'll never let you down again
G
I know the devil you've been fighting with
Em
I swear I'll never let you down again
[Bridge]
G Em
We're no saviors if we can't save our brothers
G Em
We're no saviors if we can't save our brothers
[Chorus]
G
So if you call me back or let me in
Em
I swear I'll never let you down again
G
I know the devil you've been fighting with
Em
I swear I'll never let you down again
[Chorus]
G
So if you call me back or let me in
Em
I swear I'll never let you down again
G
I know the devil you've been fighting with
Em
I swear I'll never let you down again
C D G
I'll never let you down again
Source: https://tabs.ultimate-guitar.com/tab/the_wonder_years/cardinals_chords_2310949