Syncro
Platinum Member
Does anone know if GM uses Dexron in the power steering pumps? I have a 1986 GMC Medium duty truck but all the service manual says is to use 'GM Power Stering Fluid' with no reference to Dexron. If there is indeed such a thing as special power steering fluid on older GM vehicles, I wonder if it would be the same as tractor hyd oil, which would seem heavier than auto trans fluid.