In Pixar's Cars, Lightning McQueen's race hauler is named Mack.
Mack is a red articulated truck who transports Lightning between races. He is practical, loyal, and frequently exhausted by Lightning's demanding schedule. At the beginning of the film, Mack is responsible for getting Lightning to California for the final Piston Cup race, but a roadside mishap separates them when Lightning falls out of the trailer during the night.
A common mix-up is spelling the character's name as “Mac.” In the film and official character listings, the hauler is Mack, with a “k.” The name also distinguishes him from other truck characters in the franchise, including Cars 2's spy-themed vehicles and Cars 3's racing support cast.
Mack's design is based on a conventional semi-truck and trailer rather than a racing car. His role helps connect the professional racing world with Lightning's isolated journey to Radiator Springs.