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Q: where is the purge vent valve and hose located,I need to check it, code 0466. on 2005 GMC Sierra Denali

Its a 05 sierra denali with the 6.0
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purge valve on on the front top of the motor.

the vent is back by the tank mounted on the frame.

you need a scan tool, smoke machine and voltmeter to verify if they are working. the code never identifies a bad part, just a failed system.

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