The poem in the Chevrolet Tahoe commercial is called 'Nobody Knows It But Me' written by Patrick O'Leary with the voice-over by James Garner. The words of the poem are as follows:
There's a place that I travel
When I want to roam
And nobody knows it but me.
The roads don't go there
And the signs stay home
And nobody knows it but me.
It's far far away
And way way afar
It's over the moon and the sea
And whenever you're going
that's wherever you are
And nobody knows it but me.