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Code P0171 and P0174

dawgfan

By dawgfan
in 1999-2013 Silverado & Sierra 1500

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dawgfan Enthusiast

dawgfan

Posted
Posted

Are these indicative of my fuel punp going bad? I think they are System too lean and mean lacking enough gasoline?

anumber1 Enthusiast

anumber1

Posted
Posted

It is perhaps low fuel pressure but more likely failed intake manifold gaskets.

 

Check your fuel pressure. Gonfrom there.

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