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Q: location of temp sensor on 1999 Cadillac DeVille

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engine fan will not come on only when i turn the heat or ac on. location of temp sensor
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The coolant sensor on the northstar engine in your 1999 Cadillac DeVille is located on the back end of the rear head. Not very easy to get to as I remember. The cooling fans should come on at about 230 degrees.
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