Chug

Chug is a fuel truck in Planes and Planes: Fire & Rescue.

Official Bio
Fuel truck Chug is a guy’s guy. He works hard as co-owner of Chug and Dottie’s Fill ’n Fly service station—and plays hard indulging in his own fuel from time to time. He has a big personality and is a bold supporter of Dusty’s high-flying endeavors. Indeed, he’s not only Dusty’s buddy, he’s his coach and biggest fan. And if Chug can’t help Dusty reach new heights, he’ll find someone who can.

Planes
His fuel tank and nozzle are used to refill planes and, on one occasion, Mayday the fire truck. He is good friends with Dottie and Sparky. He is also a friend and fan of Dusty Crophopper.

Planes: Fire & Rescue
According to an interview with Bobs Gannaway and Ferrell Barron on Planes: Fire & Rescue, Chug is scheduled to appear, although it is unknown if Brad Garrett will return.

Trivia

 * He is inspired by Bob Leaders' disused fuel truck that was found in a grove of evergreen trees when the filmmakers traveled to Leaders Clear Lake Airport in Minnesota while touring regional airports in the Midwest for inspiration for their Propwash Junction setting.