Mack (known as Mack Hauler in some merchandise releases) is Lightning McQueen's transporter, bringing him to all of his Piston Cup races. Mack became Lightning's transporter after he recommended McQueen to Rusty and Dusty Rust-eze when they were searching for a new sponsor.
In Cars, Mack first appears at the Motor Speedway of the South, where McQueen is making his way over to him after the three-way tie. However, McQueen finds that Mack has parked his trailer at the back of his sponsor's tent, so that McQueen can easily exit after making a personal appearance. However, McQueen hates appearing in front of rusty cars, and desperately tries to sneak through the tent by hiding behind a cardboard cutout of himself, although the board falls over and the rusty cars crowd him.
Mack and McQueen travel the entire day to the Los Angeles International Speedway, where the tie-breaker race will be held. However, due to a bet McQueen made with Chick, he tells Mack to drive through the night. Nervous about the task, McQueen assures him that he will stay awake with him, though he falls asleep shortly after, leaving a sleepy Mack on the highway. DJ, Boost, Snot Rod and Wingo mess with Mack as he dozes off, causing a trophy to fall down, releasing McQueen from his trailer. Upon his arrival at the speedway, Mack is shocked at the reaction of the press once it is discovered McQueen is absent, worrying about whether or not he wiped his mudflaps.
The press receive a call from Doc Hudson about McQueen's location, and Mack, along with hundreds of other reporters and camera cars, come to retrive Lightning. At the speedway, Mack becomes part of McQueen's pit team.
Cars: The Video Game
In Cars: The Video Game, Mack and the new McQueen are very good friends and are still working together in the Piston Cup. He appears in one of the cutscenes for the Radiator Springs Grand Prix event, where he tells Lightning that he should get back into shape for racing before the next season starts. He then appears in all the cutscenes for the Piston Cup races. In High Speed Heist, Mack has now proven himself to be a little easy to distract, as the Delinquent Road Hazards make him fall asleep on the highway and rob him of McQueen's racing gear. Then Mack reports to Sheriff that he was robbed, and Sheriff tells Lightning about the robbery. Then in the cut-scene for Los Angeles International Speedway, Mack was kind of sad, because it was the end of the season, and he was gonna miss the season.
In Mater and the Ghostlight, Mack appears at Flo's V8 Cafe with all the other townsfolk, listening the Sheriff tell the story of the Ghostlight, After the story is over, he helps the others pull a prank on Mater by putting a lamp on his tow hook.
Cars: Mater-National Championship
While Mack does not appear in Cars: Mater-National Championship, some data found within the game's files seems to suggest that Mack was intended to appear. This includes having a non-playable character listing, as well as a localized name.
Mack doesn't play a big role in Cars: Race-O-Rama. He appears in Mack Track Challenge, where you must use his trailer to do a big jump. Mostly in the game, he is the transporter that helps you get to different places in the game.
In Cars 2, Mack is still working with the Piston Cup, continuing his occupation as Lightning's team hauler. He is briefly seen at the beginning when Lightning returns to Radiator Springs, where he says one of his only two lines, "Oh, these best friend greetings all get longer every year". He doesn't accompany him to the World Grand Prix due to being on vacation. At the end, he talks with Lizzie and says the other of his only two lines of the movie, "Oh, those two are perfect for each other."
Mack appears in the Cars Land attraction, Radiator Springs Racers, when the riders enter the dark tunnel. After the riders hear Minny say "Van, are we lost again?", the riders swerve around Mack, Minny, and Van.
Mack is based off of a 1980s-era Mack Super-Liner semi cab, with a compatible trailer. His license plate is RUSTEZ3.
Mack's cab is painted red, and has a grey grille with his name on it. The trailer he hauls around is red and grey, with a picture of Lightning McQueen, the Rust-eze logo, the number 95, and Lightning's name painted on each side. He has chrome rims.
Personality and traits
Mack is incredibly loyal to Lightning McQueen, and seems to act as a fatherly figure to him. Their friendship began back when Rusty and Dusty Rust-eze were searching for a race car to promote their product, and since Mack was already a fan of McQueen, he recommended him as the sponsor. After Mack recruited Lightning, Rusty and Dusty provided details about Rust-eze, which initially didn't make Lightning want to accept their offer, but ultimately accepted after Mack agreed to be his transporter.
Another characteristic that is usually seen throughout the series is Mack's short attention span, which allows him to be distracted easily.
Powers and abilities
Mack is a very strong vehicle, allowing him to pull Lightning's trailer with ease. However, he often dozes off while doing so, allowing him to be pushed around by other cars on the highway.
"Endless days on the road and sleepless nights criss-crossing the country... For some this life would quickly grow old. But not Mack. No sir. Mack knows how important his role is. He's driving Lightning McQueen, the world's fastest racecar. He's part of a team, and everybody knows there's no I in team, just like there's no I in Mack."
"Mack is Lightning McQueen's trusted long-haul driver, crisscrossing the country from race to race, always with a smile on his grill. After dropping McQueen off in Radiator Springs with his fourth Piston Cup championship trophy, Mack sets off with the rest of the pit crew for a well-deserved vacation. Who knew that McQueen would end up jetting off to a race around the globe in the World Grand Prix?"
"Hey, kid! You ready go after that Piston Cup?" - Cars: The Video Game
"Well, you said it... just as soon as you get some practice." - Cars: The Video Game
"Besides, they just don't let anybody with four wheels race for the Piston Cup you know..." - Cars: The Video Game
"Oh, these best friend greetings all get longer every year." - Cars 2
"Oh, those two are perfect for each other." - Cars 2
Names in other languages
When Mack watches the Cars parodies of previous Pixar movies, he thought whoever did the voice of Hamm, P.T. Flea, and the Yeti as cars is one great actor until he realized they used the same voice actor in all movies and wonders "what kind of a cut-rate production is this?". This is a reference to John Ratzenberger (who portrays Mack) potraying at least one character in every Pixar movie.
In Cars 2, he has the least amount of dialogue out of all of John Ratzenberger's roles, as he only had two lines.
The wind deflector on Mack's roof actually resembles a trucker cap, which is often worn by many truck drivers in real life. This is extremely noticeable due to the prominent visor protruding above his windshield (eyes).
For some reason, Mack and Lizzie are the only inhabitants of Radiator Springs that did not participate in the final battle against the Lemons in England at the end of the sequel. Also, Mack and Lizzie are the only inhabitants of Radiator Springs who did not come to England. Fillmore also does not participate in the London battle, mostly likely because he is a pacifist.
For some reason, the dog-shaped hood ornament on Mack's hood isn't car-ified.