Soul Enchilada by David Macinnis Gill

Girl meets boy at a car wash.
"Dog," she says.
"Dude," he says.
And probably this would have been a sweet teen romance. . . .
If Beals hadn't been sitting next to her in the car.
If Beals hadn't been a supernatural repo man looking to repossess her car.
And to possess her.

David Macinnis Gill delivers the whole enchilada. With a side of soul.