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  1. 2005 suburban low oil pressure

    Chevy Suburban Forum (GMC Yukon XL)
    Hi all. Been trying to figure out a low oil issue on my brothers 2005 suburban z71 with a 5.3 and 140k on the clock. Idles at about 20 lbs of pressure, maybe a touch lower. Replaced the oil pressure sensor, didn’t help. Did the o ring, also didn’t seem to help but the old o ring was pretty...
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