P0174 and P0171 99 5.7 K1500 Suburban

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Stepside_fever95

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Just had these two codes come on today. I just had my two catalytic converters replaced about a month ago but I don't think it's related to that. I have had a vacuum leak on my brake booster, whether it's the booster itself or the line going to the intake manifold. Would this cause the code to come up? Being they both came on at the same time I doubt it's the o2 sensors.

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