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Home >> Chevrolet >> 2004 >> Chevy Express G3500, Van Cargo Extended, 6.0 U >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.8L, 5.3L & 6.0L (Introduction) >> Description and Operation >> Fuel System Description >> Fuel Fill Pipe

Fuel Fill Pipe

Fig 1: Fuel Fill Pipe View
GM1244329Courtesy of GENERAL MOTORS CORP.

The fuel fill pipe has a built-in restrictor in order to prevent refueling with leaded fuel. Once the fill vent is obstructed, fuel backs up the fill pipe and trips the dispensing nozzle. The fuel tank vent valves are connected and route to the canister to collect hydrocarbon emissions during operation of the vehicle.

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