Mich. Comp. Laws § 257.79c: “Wrecker” defined.

Sec. 79c.

"Wrecker" means a truck with a hoist, towing apparatus, or self-loading flatbed, or any combination of these items, permanently affixed to the truck, used to transport not more than 2 vehicles, except for a motor vehicle equipped with a fifth wheel or a motor vehicle that tows the second vehicle on a trailer.