Update (August 23): Unfortunately, Syfy removed the trailer mere hours after the movie had aired.
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With only about a week until Phantom Racer airs, Syfy has finally made a trailer for the movie available. You can watch it here on Syfy’s official website.
If you look close enough, you can see Luciana as Deputy Monroe for a fleeting moment in a scene with Sheriff Hodges about 16 seconds into the video. Don’t blink, or you’ll miss it. As you probably can’t see a lot in this fraction of a second, here is a screen cap for you:

Luciana in the Phantom Racer trailer
By the way, Sheriff Hodges is played by another Battlestar alumnus, Winston Rekert. He played a priest in three episodes of BSG, but none of them featured Luciana.
Phantom Racer will air on August 22 at 9 pm on Syfy.
You can discuss the movie on the Luciana Carro Fanboard.