the low coolant light stays on even though the radiator and reserve tank is completely filled. Any ideas? All help is appreciated.

 

It's a common problem. You can try to clean it, just replace it or you have the option of just unplugging it to kil the lamp on the dash. Unplugging it won't affect anything but the lamp. The sensor is not tied to the pcm.

 

Have you bled the lines? Are you running 5-10% coolant minimum? If both of these are a yes, then you may have a dead/dying sensor in the water pump, some people claim to clean them off with some success.

 

If you do choose to unplug it, don't forget to check the level periodically.

 

Mine also came on and I checked the level and it was OK. It finally went off about a week later and after that the damn thing overheated and spit all of the coolant out of the filler cap

Got it flushed and haven't had a problem since

 

where is and what does it look like so i can try to clean it off and/or unplug it? Can i get it replaced?... how much?

P.S. Im running 50% coolant.

Thanks.

 

Look at Rob's tech page and it will show you where it's located. It's right under the radiator cap.

 

Right under radiator cap. It is a little flat square looking thing. About 2in x 2 in. Its hled in with a metel clip. If you remove the battery it is cake to get to it.

 

3 coolant sensors, gotta love the confusion.

 

-- thanks guys

 

gm parts direct

part number 10096163, think it's about $30 with shipping.

now i stopped and asked Discount Auto once and they said they had one for around $9....i was a bit skeptical. i didn't buy it since i didn't have the cash at the time. but it's worth lookin into.