Do You Have a Pin Stripe?

I have an '08 LTZ which was a 'Spring Special', the first of the 4cyl with 6 speed trans. It is golden pewter and has a double tape pin stripe running from front to rear of the car above the door handles.

Is this tape stripe stock with LTZs, the Spring Special options, or could it have been installed by the dealer? Anyone else have this stripe on your car? Does not show up on the sticker, I can't see it in any brochure pics, and I haven't seen it on any other Malibus I've seen. Just curious.