Im On Standby Chords

-This is a simple tab for the rhythm guitar

 C
I'm rolling down a well worn road
 Am
I'm wondering if I'll ever know
 D9 or Dm?(not sure about either of those)
If I'll be better than I was before
 G
When I surface through the service door

 C
Bye 
          Am
I'm on standby
                     D9 or Dm
Out of order or sort of unaligned
                      G   
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     C
Bye bye
           Am
I'm on standby
                      D9 or Dm 
According to the work order you signed
                   G  
I'll be down for some time

I'll be down for some time

*Pattern continues through the rest of the song*

I got good at saying "I gotta go"
Number one at saying "I don't know"
But from the stories I've heard
You humans require more words

Bye 
I'm on standby
Out of order or sort of unaligned
Powered down for redesign
Bye bye
I'm on standby
According to the work order you signed
I'll be down for some time
I'll be down for some time