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Codes P0449 And P0455. ?


mightbstock

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The codes are for a faulty Vent Solenoid Valve, it is a common problem among late model GM trucks from 2002+. The most recent update to the GM TSB(4th update to it) involves re-routing the Vent Hose from the Filler Neck, up to the Transmission Tunnel, along with replacing the VSV. I posted the TSB here on the forum last year, let me know if you need it......

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