C 2500 Suburban 2WD V8-454 7.4L (1994)
Fuel Filler Hose: Description and Operation
Purpose:
To help prevent refueling with leaded gasoline, the fuel filler neck on gasoline engine vehicles has a built-in restrictor and deflector.
Operation
The opening in the restrictor will only admit the smaller unleaded gas nozzle spout, which must be fully inserted to bypass the deflector.
Attempted refueling with a leaded gas nozzle, or failure to fully insert the unleaded gas nozzle, will result in gasoline splashing back out of the filler
neck.
