C 2500 Suburban 2WD V8-350 5.7L VIN K TBI (1995)
Fillpipe Restrictor: Description and Operation
Fuel Filler Neck
Fuel Door And Restrictor (Typical)
Purpose
To prevent refueling with leaded fuel, the fuel filter neck has a built-in restrictor and deflector. The opening in the restrictor will accept only the
smaller unleaded gasoline fuel nozzle which must be fully inserted to bypass the deflector.