A very elderly family member failed to get TSB(SB-10056459-3388) done on a 34k mile Acadia within the 10 year limit, that switches fluid to Dextron VI. Surprisingly the power steering still works but the fluid is really black. What fluid would you use to flush it out with for now, to buy some time. What is the OEM fluid? Signed by: GM Vehicle Dumb
Added: Confirmed the original OE fluid as GM part #89021184 . Now searching for alternatives.
Added: Confirmed the original OE fluid as GM part #89021184 . Now searching for alternatives.