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The DTC P0449 is: EVAP Emission Control System Vent Vlv/Sol Malf
Straight out of my code book. Hope this helps you out.
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How do you fix engine code p0449?
Here is a video on how to fix engine code p0449
How do you fix p0449 code on a 2003 silverado 1500?
The most probable cause is a vacuum leak or a bad fuel cap. Inspect all the vacuum hoses for damage and buy a new fuel cap, making sure it is tightly on the vehicle.
How do you fix all the gauges on a 2003 Silverado truck?
How_do_you_fix_all_the_gages_on_a_2003_Silverado_truck
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Check your charcoal fuel canister. I had the same problem changed the light went out. The problem fixed.
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