My '07 has about 1300 miles so far, the day after i bought it i took a 200 mile drive since i moved to college. When i started it up the next morning after the drive to make a quick errand i got the "LOW COOLANT" warning. I popped the hood and checked it out and the coolant was at the correct level. That was on Aug 17th. Fast forward to Sept 3rd, the light shows again after not coming on since the time in august. I also had my GMP header and exhaust put on that day. No codes are being stored, checked by one of my friends who is a GM Tech. Now about 75% of the time i start it, i get the "LOW COOLANT" message. Coolant level is still fine. I'm thinking it's just a bad sensor, going to the dealer to put on my stage 2 so i'll have them check it out...i monitored the coolant temps during a trip and when cruising at 60-90 the coolant temp is around 182-185. When i'm in traffic going below 20mph the coolant temp rises to 215 to 220.

Any ideas besides just a bad coolant sensor?

 

Probably a bad sensor. When in traffic, turn on your A/C, it will keep your temps at 190 max. I hate it when I look down and see something crazy like 215....

 

i threw a low coolant light when my cap wasn't screwed on tight, but when that happened the coolant started to over flow due to the temperature difference. take it in and get the sensor replaced under warranty.

 

thats what i thought, maybe it was a bad sensor but since i didnt have enough time to install his stage 2 there was no way in hell i could replace the sensor

 

tap the sensor on the radiator if you can on these

I did with my old one and it worked out fine lol

although sometimes the air needs bled out of the cooling system....I hope that's not your case which I don't believe it is

 

i get the same thing a few times a week, i just ignore it my coolant is at the right level too...

 

when i got my 07 i would go to start it and then the low coolant light went on then turned off in like a second, it pissed me off so i added like 1/2 a bottle of water wetter and hasnt came back on yet.

 

yeah, i think the 07's all came with the coolant a little low. the 2nd day i had it showed low coolant, then a month later i got it again. Bought a bottle of Dex-cool just to have in the trunk and i added a little. No "low coolant" light since then(2 months ago)

 

That just happened on mine a few days ago....Checked the level, it was fine...Added just a little water and it hasn't come on since

 

Ditto. This is happenning to me as well and I have an '07 with just over 1k miles on it.

 

Same here, started the day after I bought it, except mine is actually losing coolant and the dealer can't figure out where it's going. At first they said the sensor was grounding out (the plug-in underneath the overflow tank) so you may want to check that.

 

I have had the same problem...Have an 07' with 5,000 miles on it

 

Mines an 06 and I get it all the time, and my coolant level is correct aswell. I just ignore to. When the car warms up it goes off.

 

added some more coolant and no more mesage since