Chuck - the main character of the series, is a dump truck. Chuck aspires to be a race truck. His parents are Haulie and Porter, and he has an older brother named Rally. He has various friends, and tries to be the best friend he can be, though he can sometimes be selfish and a bit angry. For example, in "Lights, Camera, Trucks", he repeatedly stops a film production in order to get it perfect. Also, in "Fender Bender", when he accidentally gets injured by Boomer by playing tag, he takes advantage of Boomer in order to get out of cleaning his room. It is revealed in "The Best" that he is great at racing on paved roads. He often uses the phrases "Red-hot turbo chargers!" and "Powering pickups!" He, along with his friends, chant the phrase, "Friends for the long haul!" Chassie shows feelings for him.
Rowdy - a garbage truck. He is one of Chuck's friends. Like his type of truck indicates, he enjoys getting filthy, usually to the chagrin of his friends. In one episode, it is revealed that he is great at finding things, although he loses the horn his grandfather gave him in the episode "Mystery, He Rode". He likes sleeping sometimes.
Handy - a tow truck. He is one of Chuck's friends. As his name indicates, he has various objects, usually tools, in the bed of his truck. He also has a hook. He is often seen with Soku. In the episode, "Charlie the Screwdriver", it is revealed he has a younger brother named Clutch who is also a tow truck and is missing a front tooth to indicate his young age.
Digger - a backhoe loader. He is one of Chuck's friends. As his name indicates, he enjoys digging. He has a Spanish accent. He refers to his friends as "amigos". In the episode "The Best", it is revealed that he can race best on a track with obstacles. In "Fort Chuck", he made up a joke about when he falls asleep, he tells Chuck and friends that he is a "bulldozer". In the episode "Sleepdriving Chuck", it reveals him to keep an eye-out for Chuck.
Biggs - a monster truck. He is one of Chuck's friends. As his name indicates, he is a big truck. He has a Texas accent which is evidenced by the horns on his and his Father's cab roofs. He refers to his friends as his "buddies". In "The Best", it is revealed that he can race best on a dirt track. His catchphrase is "Wa-hoo!"
Boomer - a fire engine. He is one of Chuck's friends. Boomer seems to have a gut feeling that a plan might not work. This is seen whenever he voices his opinion that he is not sure about something. He also seems to be the most loyal to Chuck. This is seen in "Fender Bender", when, although Chuck had a minor injury on his side, he tended to Chuck.
Flip - a new friend of Chuck's. As his name indicates, he is a stunt truck/bounce-back racer that flips. He has two sides: one that allows him to speed, and one that allows him to manuveur around obstacles. He was introduced in the movie, The Big Air Dare. Although he is competitive with Chuck, he turns out to be a caring friend who hates to see Chuck endangered. He is probably part of the regular cast of characters since he also appears in a second season episode. While he still retains his competitive attitude, he was one of the three main characters that lost his first voice actor.
Haulie - Chuck's mom. As her name indicates, she is a forklift. She runs a repair center. In the episode, "Sleepdriving Chuck", it reveals she makes a promise to Digger to keep an eye-out for her son when he goes "sleep-driving".
Porter - Chuck's dad. As his name indicates, he is a big rig. He runs the diner. He is one of the three characters that lost his first voice actor. In "Daredevil Chuck", he didn't know that Boomer had taken his toolbox.
Soku - a souped-up cruiser car. He is one of Chuck's friends. As his name indicates, he is of Japanese origin. This is shown in "Soku-Kun", when Kazuo, his cousin from Japan visits. He is often seen with Handy. He is one of the three characters that lost his first voice actor. Although he and Biggs got bored of making the film perfect, that was revealed in "Lights, Camera, Trucks!".
Rally - Chuck's brother. As his name indicates, he is a racing truck. He seems to be quite successful. Unlike most sibling pairs, Chuck enjoys his brother, even though he is famous. Chuck seems to look up to his older brother and, instead of getting jealous, he aspires to be a racing truck like him. Rally's motto is "Over, around, and through, trucks go and see and do!" This is sometimes repeated by Chuck to his friends, like in episodes such as "The Pothole" as well as in the main title theme song. He has a racing truck friend named "Flash" who mumbles and only Rally can understand him, saying in the episode "Race to the Race" where Flash was also introduced. He is referenced again in the episode "Charlie the Screwdriver".
Chassie - a lilac truck who first appeared in the second season. She enjoys nothing more than to dance away with her friends, especially Chuck, who she shows feelings for.
