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Home >> Hummer >> 2009 >> H3 Alpha >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 5.3L - Introduction >> Description and Operation >> Fuel System Description >> Fuel Fill Pipe
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Fuel Fill Pipe

The fuel fill pipe has a built-in restrictor in order to prevent refueling with leaded fuel. A vent valve in the fuel fill pipe assembly closes when the fuel tank reaches capacity, forcing fuel to back up in the fill pipe, shutting OFF the fuel dispensing nozzle.

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