I mostly oriented myself from the acoustic version that can be found on Spotify on their album "All or Nothing (International Bundle 1)", Billy plays it slightly different on https://youtu.be/UEOPpgDPX_w where he plays some Gadd6s as normal G chords, those instances will be written as 'G6'. He also plays the intro only twice in the video. Chords used: Dm xx0231 Fmaj7 x33210 G 320033 Gadd6 x55430 Am x02210 [Intro] Am G Fmaj7 Dm x4 [Verse 1] Am G Fmaj7 Dm Get out of my town, get out of the spotlight Am G Fmaj7 Dm You saw my heart so what does it look like? Am G Fmaj7 Dm It's not what you do but how it gets done Am G Fmaj7 Dm And now I've had my fun [Pre-Chorus 1] Fmaj7 Gadd6 I took you out into the world Am Dm I tore you down and I burnt you badly Fmaj7 Gadd6 I scream and shout, I'm lost for words Am I don't know Fmaj7 Gadd6 I took my gun, shot you down Am Dm Left an exit wound that you're afraid to show me Fmaj7 Dm I scream and shout but I'm lost for words G6 I don't know [Chorus] Am I won't let you down Fmaj7 I won't let you down Dm G6 I won't tear your heart out [Interlude] Am G Fmaj7 Dm x2 [Verse 2] Am G Fmaj7 Dm I got your message and I feel like a mistake Am G Fmaj7 Dm You said you want to learn to let go of dead weight Am G Fmaj7 Dm It's not what you do but how it gets done Am G Fmaj7 Dm And now I've had my fun [Pre-Chorus 2] Fmaj7 Gadd6 I brought you back right down to earth Am Dm I twist your skin and I bruised you badly Fmaj7 Gadd6 I scream and shout but I'm lost for words Am I don't know Fmaj7 Gadd6 I took your heart for what it's worth Am Dm You say there's nothing else for you to do but hate me Fmaj7 Dm I scream and shout but I'm lost for words G6 I don't know [Chorus] Am I won't let you down Fmaj7 I won't let you down Dm G6 I won't tear your heart out Am I won't let you down Fmaj7 I won't let you down Dm G6 I won't tear your heart out [Bridge] Am I won't let you down Dm Fmaj7 Gadd6 I won't tear your heart out Am I won't let you down Dm Fmaj7 G6 I won't tear your heart out [Chorus] Am I won't let you down Fmaj7 I won't let you down Dm G6 I won't tear your heart out Am I won't let you down Fmaj7 I won't let you down Dm G6 I won't tear your heart out [Outro] Am G Fmaj7 Dm x3 Fmaj7 Gadd6 Am I won't let you down
Source: https://tabs.ultimate-guitar.com/tab/the_subways/i_wont_let_you_down_chords_1856495