Tabs
(He plays it capo 3 - you can't get the bends and releases without it)
Intro and main riff throughout the song
A augmentedA 
E MajorE 
D MajorD
e|------------------------------------------------|
BB|-----------------3-3----3-3---------------------|
G+G|--2-2------------2-2----2-2---------------------|
D MajorD|--2-2-----2-2----0-0----0-0-----repeat----------|
A augmentedA|--0-0-----2-2—3b-----3b-------------------------|
E MajorE|------3b--0-0---------------3b------------------|
There are palm mutes in there but this is the main skeleton of the riff. There
are also a few parts where you hold and repeat the bend on the D MajorD toward the end
of each chorus.
Chorus
(Main riff throughout)
Don't put my love on your back burner
Never let anything that hot get cold
And if you ever change your mind
Want to leave my love behind
Just let me be the second one to know
Yeah, the second one to know
Verse 1
(Main riff throughout)
Hold up my right hand
Swear to the Promised Land
Rather die before I treat you bad
All I ask from you
Is treat me the same way, too
'Cause I don't want to lose this thing we have
Chorus
(Main riff throughout)
Don't put my love on your back burner
Never let anything that hot get cold
And if you ever change your mind
Want to leave my love behind
Just let me be the second one to know
Yeah, the second one to know
Solo
(Over the main riff - shocker, I know)
*This is NOT tabbed according to the capo position but to the actual
frets on the neck*
e|-----------8--8--8--11-8--8--8-------------------------------------------|
BB|--11~~~~-----------------------11----------------------------------------|
G+G|--12~~~~--------------------------10b-8-10b-8-10-8~~---------------------|
D MajorD|-----------------------------------------------------10-8----------------|
A augmentedA|----------------------------------------------------------10--8-6--------|
E MajorE|------------------------------------------------------------------6>8~~~-|
The second half of the solo is repeating the 6-8 on the E MajorE string, then work
your way back to the root 
C majorC note (D MajorD string 10th fret)in this scale:
E MajorE|-------------------------|
BB|-------------------------|
G+G|-------------------------|
D MajorD|-------------8-10--------|
A augmentedA|------6-8-10-------------|
E MajorE|--6-8--------------------|
Verse 2
(Main riff throughout)
First, you stole my heart
That was the easy part
Don't ever tell me that crime don't pay
Now that it's in your hands
Want you to understand
I would have given it to you anyway
Chorus
(Main riff throughout)
Don't put my love on your back burner
Never let anything that hot get cold
And if you ever change your mind
Want to leave my love behind
Just let me be the second one to know
Yeah, the second one to know
Other versions of Second One To Know
Alternative guitar chords and tabs for Second one to know (Ver. 2) by Chris Stapleton
