1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Possible LIM/UIM Problems?

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Old 07-16-2007, 10:34 PM
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If that were true, it would be the first time I've ever even HEARD of it. They do both go through the radiator, but it'* not really possible to mix.

Look for oil residue in the overflow tank. Being lighter than water, trans fluid would naturally go there.
Old 07-16-2007, 11:01 PM
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well that is what i had originally noticed, oil residue in the overflow tank...that was the brown color on the very top, and the rest of the coolant looked normal
Old 07-17-2007, 04:53 PM
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check the tranny fluid? Perhaps someone added some sort of water-wetter stuff to help cooling and it'* gone bad? I don't know.
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