Ever since I bought my truck I've had this problem. The low coolant light comes on sometimes but there is always plenty of coolant in the system. It pretty much only comes on when the truck is fully warmed up and when I've been sitting idling for more than a minute or two, like at a stop light. It only does it every now and then, like maybe every 30-40 miles I'm guessing. It eventually turns off. Could this just be a bad sensor? Anyone had this problem? Is the coolant level sensor in the resevoir or the radiator? Thanks!

 

Mine did it twice in the last 3-4 months, turned my truck off and started it back up both times and the light was gone, I also found this odd

 

the sensor is in the reservoir, i beleive you can only get it with the tank. I've seen a few of these at the dealership

 

tHE PART NUMBER YOU NEED IS 15203949, AND IT RUNS ABOUT $50 AT ANY DEALER. YOU DO HAVE TO BUY THE WHOLE TANK TO GET THE LEVEL PROBE. COMMON PROBLEM, SEE THIS ALOT.

 

Mind does it as well. I spent maybe 3 hours total time on it to bleed out air. I am confident that it is the sensor in my case

 

dex cool gets gunky over the years. they claim it to be 150,000 5 years but i would flish it every 2 years or 50,000 wichever comes first

ive replaced a few of these sensors over the years.

 

yeah wifeys 01 tahoe does that sometimes too. she is also having issues with her fuel tank gauge. but i hear thats a normal chevy deal so..

 

was her tahoe recalled? there is a recall for the fuel pump wire harness in the early 20xx trucks.

 

There's no re-call on a faulty fuel guage.

 

Do you see the Caps Lock on the left side of your keyboard?