S10/T10 Blazer 2WD V6-262 4.3L VIN W CPI (1992)
Fuel Filler Hose: Description and Operation
Fuel Filler Neck
To help prevent refueling with leaded gasoline, the fuel filler neck on a gasoline engine vehicles has a built-in restrictor and deflector. 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.