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  1. Chevy Suburban Forum (GMC Yukon XL)
    Can a front actuator be bad and still work? My light came on when useing 4x4 (although 4x4 still worked). took to the shop and they said the TCM code showed a bad front diff actuator. But they - and myself - verified it seemed to engage and disengage properly. So they cleared the code. LIght is...
  2. 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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