A complete or substantially complete cab—the structural enclosure surrounding the driver's compartment—is classified under 870790. Individual panels, doors, or trim components that do not constitute a complete cab or body are generally classified as parts and accessories under the motor-vehicle parts heading. The degree of completeness and whether the article has the essential character of a body or cab governs the distinction.

Typically not. A camper shell or tonneau cover is an accessory added to an existing truck body rather than a body itself, and it is generally classified under the motor-vehicle parts and accessories heading. A purpose-built camper body designed to replace or constitute the vehicle's cargo/living enclosure may be assessed differently; a binding ruling is advisable for such articles.