In Pixar's Cars, Fillmore is the town resident modeled as a 1960 Volkswagen Type 2 bus.
Fillmore is Radiator Springs' peace-loving, environmentally conscious resident. He operates a small shop selling organic fuel and often contrasts with Sarge, the military-themed vehicle next door. Their disagreements provide recurring comic moments in the town scenes.
The Volkswagen Type 2, commonly called the Transporter or Microbus, became strongly associated with 1960s counterculture. Fillmore's design and beliefs deliberately draw on that cultural image, while his name references counterculture musician George Fillmore.
Fillmore is voiced by George Carlin in the first Cars film. Sarge is a military-style Jeep, Ramone is a lowrider who runs a body-art shop, and Luigi is an Italian Fiat 500, so none of those characters matches the Volkswagen bus.