K 2500 Suburban 4WD V8-454 7.4L (1994)
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.
