Need Help on Low Coolant Light Please

[ws6speedpaul]

I have owned since new a stock, 1999, WS6 T/A and the low coolant light came on while driving yesterday, temp gage was reading a steady 210 degrees F as always, and never came on before. When cooled, I checked the radiator and found the level to be at the top, just like every other time I checked it during routine PM. I checked the overfill bottle and found the level very low, and there was some crust on the plastic dip stick which appeared to be dried DexCool. No evidence of any external coolant leak.
I added DexCool to the corrct level in the overfill bottle and fired up the car. The low coolant light came on again, so I drove it for about five miles, turned off the motor to reset the warning light, and restarted the car only to have the warning light come on again. Did this several more times on my way to work at traffic lights(approx 20 miles), and the warning light still comes on. The temp gage remains a steady 210 degrees F with no fans. Once I got to work, I popped the hood and very carefully checked the radiator and collant levels, and they were still fine.....no coolant loss detected.

Can anyone offer any other solutions?
Where is the location of the low coolant sensor?
Could the sensor be caked with dried DexCool enough to throw a bad reading?

Any help would be greatly appreciated!

Thanks, Paul

[RangerBob]

The sensor is dirty. Take it out, clean it, put it back

[Jeff_in_Atl]

Common problem with the coolant sensor. If you look down the posting, you will see it several times. Take a look at Rob's link. http://csce.uark.edu/~jgbertr/rb/low_coolant2.jpg

[ws6speedpaul]

Thanks guys! Is the......

.....coolant level sensor the same type and location for the LT1 and LS1 motors?

Thanks, Paul

[Jeff_in_Atl]

I'm not sure but I am looking.

[Jeff_in_Atl]

OK I found it. Yes it is the exact same on the 98-99 models. It is the 2 wire version.

http://www.gmpartsdirect.com/
GM PART # 10096163
CATEGORY: Radiator Tank Cap
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $47.63
OUR PRICE: $23.82

[N20LT4Bird]

Dex cool sucks. Change it. That crusty stuff in the bottle is probably in your radiator and engine too.