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p0446

  1. P0446 and Fuel Problems

    Chevy Silverado Forum (GMC Sierra)
    My 2018 Silverado is throwing code P0446 which i causing a rough idle and lower power when accelerating. It is also impossible to add fuel to my tank. I can put in about 30 cents before it kicks off. It takes 10 minutes to get half a tank. I'm being told to change the canister purge valve...
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