HI, MY CAR RUNS PERFECT, BUT LOW COOLANT LEVEL LIGHT IS ON AND DISAPPEAR AFTER 15 MINUTES OF DRIVING. NO LEAKS, NO OVERHEATING, JUST IS NOT TRUE THE LOW COOLANT. HOW CAN I RESET THAT LIGHT OR ERASE IT ? THANKS.

Open up car bonnet and check your radiator coolant, it’s probably coolant leaks and causing low coolant level.

I had a similar experience. Finally the car started overheating. Turned out the thermostat went bad and the radiator blew a leak. Had those replaced. Runs great.

Sounds like a water pump ...cost around $100.00 parts and labor..

That means is low in coolant. If the coolant level ok , the problem is that u have a bad coolAnt level sensor which is located in the coolant reseivor

REPLACE THE THERMOSTAT AND RADIATOR PRESSURE CAP.IF COOLANT LOW, ADD MORE COOLANT THROUGH COOLANT OVERFLOW UNTIL COOLANT LEVEL IN THE COOLANT OVERFLOW STAY AT FULL COLD MARK.REASON POUR COOLANT THROUGH COOLANT OVERFLOW MOST GM CARS DONT HAVE RADIATOR CAP.WHEN YOU GET COOLANT LEVEL OKAY, CRANK CAR LET IT IDLE UNTIL ENGINE GET HOT BUILD UP PRESSURE THEN TURN OFF CAR.CHECK FOR COOLANTS LEAKS AT THE RADIATOR HOSES,CHECK FOR LEAKS AT THE RADIATOR, CHECK FOR LEAKS AT WATER PUMP WEEP HOLE IF YOU SEE COOLANT LEAKING FROM WEEP HOLE REPLACE WATER PUMP. IF CAR OVERHEATING WHILE IDLING YOUR COOLING FANS NOT WORKING CHECK COOLING FANS FUSE AND RELAYS.IF FUSE AND RELAYS OKAY THE ENGINECOOLANT TEMPERATURE SENSOR BAD.

No, you can't add too much coolant. Rather, it does not hurt anything if you do. Did you add it to the radiator, or to the overflow tank?

Let it cool, then remove the radiator cap, and if needed, add coolant to the radiator. Put the cap back on, and fill the overflow tank to the "full - cold" line. Start it and run it a few minutes and look for leaks. If you find no leaks, drive it for a day or two, then let it cool and check it again. If it is down a lot (without overheating), you have a leak somewhere. If you lose enough coolant, that will make it overheat. However, if it overheats, that can cause loss of coolant, when you stop the car, you will see steam and smell coolant, and often hear it boiling.

If it overheats again, make note of when it happens: driving on the highway, or stop-and-go around town. Overheating on the highway usually indicates a clogged radiator, while in-town overheating usually indicates a bad cooling fan (you don't need the fan above about 30 MPH). A bad fan is usually the fan relay, but it can be the fan thermostat (different from the engine thermostat), or a bad fan motor.

Look for low coolant and be sure to have heater on high when checking coolant level...

Hotter than 1/2 way is not necessarily a problem, do the fans cycle on and off?

You are most likely slightly low on coolant. I also suggest that you pressure test the system as well as the cap. Leaks allow coolant to escape and your vehicle is fussy about perfect level...

REMEMBER that when you release the pressure on a cooling system, non boiling coolant can now boil! Many people get seriously hurt... This is NOT indicative of a problem, but rather NORMAL physics, just crank it in to your proceedure...

sounds like coolant level low indicator, check coolant level and check for leaks if you cant find any the switch could be faulty

well if the head gasket has been replaced you shouldnt smeel any coolant. But have you check your coolant hoses???? for leaks or any coolant on the driveway, when your car has been sitting there overnight!???

the sensor is replaceable and runs about $15