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My engine light went on and i had it tested, the codes ...
Sent to Car Experts March 24 10:47 AM

My engine light went on and i had it tested, the codes where P0449, and P0455. My question is what is this and how do I fix it? I know that it has something to do with the Evap Emissions, but how do I fix it? Please help Thanks

 

Optional Information:
2003 Chevrolet silverado 4.8

Already Tried:
new plugs and tightened gas cap

Customer (name blocked for privacy)
Status:  Closed   Value: $10
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