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    Pontiac Montana SV6 CEL codes 446 and 455

    I have a CEL on my Pontiac Montana SV6 2008, 3.9 Flex Fuel engine, short wheel base model. It should be very similar to Chevy Uplander 07 - 08. A local deal pulled codes P00446 (Evaporative Emmission Control System Vent Control Circuit) and P00455 (Evaporative Emission Control System Leak...
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