AI Generated (but IMO a decent result):

Verse 1:
I was rollin' down the highway, just a man and his machine
Thought I'd found forever in that chrome and gasoline
But one dark night she left me, without a single word
Now I'm sittin' here wonderin' how it all got so absurd

Chorus:
My self-drivin' truck, she up and drove away
Left me in the dust, like a shadow in the gray
She took the open road, left my heart behind
My self-drivin' truck, she's got a mind of her own kind

Verse 2:
We'd travel through the sunsets, where the sky kissed the land
A man and his machine, thought we'd always make a stand
But now the cab is empty, her seat is cold and bare
I never thought I'd lose her, thought she'd always be there

Chorus:
My self-drivin' truck, she up and drove away
Left me in the dust, like a shadow in the gray
She took the open road, left my heart behind
My self-drivin' truck, she's got a mind of her own kind

Bridge:
I see her tail lights fading, like a dream that's out of reach
No more late-night conversations, just the silence I beseech
Guess I took for granted, she'd always tow the line
Now I'm chasin' memories down this broken dotted line

Chorus:
My self-drivin' truck, she up and drove away
Left me in the dust, like a shadow in the gray
She took the open road, left my heart behind
My self-drivin' truck, she's got a mind of her own kind

Outro:
Now I'm just a lonely trucker, with no rig to call my own
A wanderer on these highways, forevermore alone
My self-drivin' truck, she's out there somewhere free
While I'm left here rememberin' what we used to be