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Q: where is the evaporative emission system vent valve/solenoid circuit located? on 2007 GMC Sierra 1500

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just had the check engine light come on and the code was PO449
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vent valve is above or around the fuel tank. the 449 only says there a control issue, it never identifies a bad part just a failed system. you better get it check first before spending the money to buy the valve.

Roy
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