: Check coolant level 00 Deville

07-13-13, 02:30 PM
My coolant level is fine but the warning will not go away. Where is the sensor, and how to troubleshoot?

07-20-13, 03:32 PM
Let's move this common surge tank problem to Deville.

The level switch is a magnetic float in the tank and a reed switch inserted into a fitting in the bottom of the surge tank. Either the float has sunk, is stuck down or the reed switch has failed.

There are many references to this in CF - Google "cadillac forums 2000 deville coolant level sensor" or something close, always preceded by "cadillac forums ......".