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99 sierra service engine light lean bank

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#1

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01-18-2007, 12:49 PM

03bluventure 03bluventure is offline

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99 sierra service engine light lean bank

i bought a truck about a month ago a 99 gmc sierra new body style 6in fabtec lift 35 in tires and much more i was driving it today and the light came on had the code read and it said lean bank 1 but no othor codes i don't have any ideas with out more to go off of any ideas

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#2

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04-15-2007, 09:35 PM

major4x

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Re: 99 sierra service engine light lean bank

was it a code p0420

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