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’did an engine swap now trying to get to pass smog code 455 large EVAP leak


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I have a 2009 SilveradoI ordered a crate from vinNow trying to get the check engine to work so I can pass smog and I’m getting code 455 large EVAP leakI’ve changed gas cap or hoses are fine changed plunge soliinid and vent solenoid What don’t know what to do next I need ideas

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