the check engine light on Code P0496 on 2004 GMC Yukon Denali

the reading said Evap flow non-purge condition: EMC has detected pressure in the EVAP system during non-purge condition

by in Wolcott, CT on December 14, 2012
0 answers
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...ally comes back on. Notice vehicle stutters to restart after shutting off to refuel. Where is purge valve located and any other thoughts?