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Home >> Cadillac >> 2010 >> Escalade EXT >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System & Fuel System - 5.3L, 6.0L, 6.2L - Description And Operation >> Description and Operation >> Evaporative Emission Control System Description >> EVAP System Components >> Fuel Fill Pipe Check Valve
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Fuel Fill Pipe Check Valve

The check valve on the fuel fill pipe is there to prevent spit-back during refueling.