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Koppchris822

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  1. Koppchris822
    I have this exact problem with a 03 Tahoe 5.3l. Bank 1 and 2 too lean and just noticed a leak while standing on my porch looking at the truck. Thinking it's the manifold gaskets because it has a rough idle when first started and cold but once it warms I think the gaskets expand and seal it and then runs halfway decent. Any ideas?

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