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2007 gmc envoy_denali
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56 Posts
Discussion Starter #1
I have a trouble code indication PO496 which I believe is: EVAP flow during a non purge condition. Also have a hard start (flooding) after fill up. Has anyone experienced this condition and where is the canister and purge valve? 2007 Denali with 123k.
Dave:undecided
 

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2007 gmc envoy_denali
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po496/po463

I have the same problem my 07 Denali with135k. When filling with gas when the car is off and misfiring when trying to start. The check engine light is on for both these codes. If you leave the car running while fueling nothing happens but is illegal in some states. Any help would be great because in NY you cant have the check engine light on for inspection and only one system not ready.
 
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