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2004 cadi deville,coolent temp sensor where and to replace it?

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coolent temp sensor where its found and, how to replace it?

If this is a NS which I think it is, it is located on the driver side of the engine, toward the rear, below the EGR valve. What makes you think you need to replace it?, did you check for DTC codes? You would remove the plug, use the correct deep socket and remove it.

Here is a photo of its location


Here is another view, the plug is circled


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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