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I have a 2008 GMC Trailblazer with engine code P049PD, what does the code mean?

Vehicle: 2008 GMC Trailblazer

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Some codes need two occurrences to set, if the code includes "PD" at the end, it means that the problem only happened once and needs another occurrence to set.

P0449 Chevrolet Code - Evaporative Emission Vent Solenoid Valve Control Circuit
Read more: https://www.autocodes.com/p0449_chevrolet.html

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