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GMTechBernard, Shop Foreman - GM World Class Tech
Category: Chevy
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Experience:  GM
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how to replace Coolant temperature sensor on a 1998 cadillac deville

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Submitted: 8 years ago.
Category: Chevy
Expert:  GMTechBernard replied 8 years ago.

Hello! On the drivers side of the motor, towards the back (just over the transmission), the sensor is in the side, just over the transmission. It will have a Yellow wire and Black wire going to it.


Make sure the engine is cool, and you will loose coolant when you remove it. The new sensor will come with sealer on the threads, so just screw it in, until its tight (don't overtighten it!).