2004 GMC Yukon Denali Q&A

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

the reading said Evap flow non-purge condition: EMC has detected pressure in the EVAP system during non-purge condition -
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2005 Yukon Denali 6.0. Check Engine Light comes on. "OBD code P0496. Evaporative Emission System High Purge Flow" . I have replaced Gas Cap. Can clear error but eventually comes back on. Notice v...