Dust cover lock system for vehicle filler neck

A filler neck closure assembly 10 for a vehicle fuel tank filler neck 14 includes a filler neck closure housing 34 adapted to be coupled to the fuel tank filler neck 14. The filler neck closure housing 34 is formed to include an outer aperture 38 sized to receive a fuel-dispensing pump nozzle 24 therein. The assembly 10 also includes a dust shield 36 mounted for movement relative to the filler neck closure housing 34 between an opened position to open the outer aperture 38 of the filler neck closure housing 34 and a closed position and close the outer aperture 38 of the filler neck closure housing 34. Locking means 37 of the assembly 10 is provided for preventing the dust shield 36 from moving to the opened position.