"Like his boss Luigi, Guido is an avid Ferrari racing fan who dreams of becoming a real racecar. To better prepare himself, he practices racing laps on Willy's Butte. One of these days, he hopes to set a new world record for the fastest lap of Willy's Butte of all time. But until that happens, he continues his quest to further enlighten himself. Currently, Guido is reading Tire Changes for the Soul, and Four Tires, One Goal."
Guido ultimately realizes his dream when he races Lightning McQueen in the 2005 Piston Cup Season on the Los Angeles International Speedway, ultimately finishing in fourth place. He subsequently went on to win fifteen Piston cups.
"Guido isn't just pretty fast with a tire, he's pretty fast, full stop."
Guido, the little Italian forklift and is the backbone of Casa Della Tires. He's Luigi's assistant and best friend, and together they are the biggest Ferrari racing fans in Carburetor County. A car of few English words other than "pit stop," Guido is a force to be reckoned with when he's racing against other vehicles. Racing Lightning McQueen on the World Grand Prix, Guido will get to show off his turbo-charged, pedal to the metal racing skills. In this film, Guido races McQueen. He is seen serving drinks at the beginning of the film. He also watches as Mater talks on the Mel Dorado Show. Later in Tokyo, he doesn't believe that Holley Shiftwell is Mater's girlfriend until the end of the film when she says it herself in a jaw-dropping moment. Uncle Topolino reveals the Guido and Luigi used to always fight and they are seen fighting over a girl car until another girl car comes and they are both satisfied. He also helps fight the lemons later in the film. He tries to take off the bomb that was attached to Mater, but his drill won't do it and he gets frustrated and leaves.
He also reappears in Cars 3, as McQueen's pitty.
In Cars Land, Guido and Luigi have their own ride at Luigi's Casa Della Tires called Luigi's Flying Tires. In the ride, the guests will get into their own fettuccini tires. When Guido turns on the air compressor, air will come out of the holes, and the tires will float in the air. There are also some beach balls with the colors of the Italian flag in the ride, and Italian music will play.
They also appear in Radiator Springs Racers. When you come to Radiator Springs from tractor tipping with Mater, you will either go into Luigi's Casa Della Tires or Ramone's House of Body Art. At Luigi's Casa Della Tires, Luigi and Guido will be there. Guido will change your tires, then they will go to the starting line and start the race.
- Guido is named for the Italian verb “guidare” which means “to drive.”
- Pixar supervising technical director Guido Quaroni, who is a native of Monza, Italy, suggested this name to John Lasseter, and was then asked to provide the temporary voice. The director liked his voice so much it made it into the finished film. Guido even got a chance to work on the character he named and voices: in Cars, Guido Quaroni performed shading work on Guido the car!
- In the Cars Toons episode: Tokyo Mater, Guido says "modify" in English, which is one of the rare times he says an English word, and the only one in a Cars Toons episode.
- Guido also says OK in Cars. In Cars: The Video Game, Guido says boss in English.
- He also says "pit stop" in English, but pronounces it, "peet stop".
- "Cars Finder" (supplementary material on Blu Ray Disc release of Cars). 2007. Blu Ray Disc. Walt Disney Home Entertainment, 2007.
- ‘Cars 2′ Introduces Nearly 1,000 New Characters and More Fun Facts