Low Coolant light

[kenny jacobs]

I have a 99 z-71 and the low coolant light will not go off. I have topped off the coolant till the overflow tank spilled over and it is still on. Where do Igo from here? Thanks

[Stocklook]

Unplug the sensor on the bottom of the overflow/fill tank and clean out the plug and the connector on the bottom of the tank, spray it with a electro cleaner if you have it, let dry and plug back in.

 

hope this helps. if this don't work you might need a new sensor

[Shaners]

Mine has come on 3 times in the 3 1/2 years I've owned the truck. I figured it's a bad sensor, and everything has been OK when I've shutdown and restarted the truck.

[sjspor]

I don't know if the sensor is a float or not, but if the coolant went low, it may be hung up and not floating back up, when this happens on my Beretta, I just gave the tank a whack after adding my quart or two of coolant.

[potz1999]

This has happened a couple times on my 99 too. I have chosen to ignore the problem and it hasn't happened again in several months. Hopefully it won't happen again or I will try Shocklook's approach.

[badpewterz]

its kinda common its not a true float type just senses if its sumerged or not and they do act up at times. live with it or replace it . im not sure on the 99's but i know the newer ones gm had the brillant idea of making it molded into the tank and not serviceable you have to replace the whole tank