I have a 1999 Buick Regal. I have installed a new thermostat but the low coolant light is still flashing. How can I get it off.

Sounds like the thermostat needs replaced. You may also want to check you MAF sensor.

Hi,

Check the sensor and wiring from it for a short.

Hope this is an easy fix for you.

Hi Mike,here's a link to the low coolant sensor,could be bad.http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?fromSearchPage=true&pageId=0900c15280067b8c&partName=Low+Coolant+Sensor&partId=0900c15280067b8c Here's another link to the part.http://www.autozone.com/autozone/parts/Duralast-Sensor-Radiator-Coolant-Level/1991-Buick-Regal/_/N-itcyeZ9pehj?itemIdentifier=349767_0_0_1568

Wipe any coolant off your engine make sure there is coolant in the car. Run engine for a bit. shut off engine and look for wet spot. Before this see if there are any cracks in rubber hoses or they are loose. It could be a thermostat gasket or warped housing to. Its hard to say without seeing it.

Make sure you are checking the coolant level in the radiator as well as in the overflow tank. The sensor is located in the radiator, so if the level in the overflow tank is good, it could still be low in the radiator.

check sensor on reservoir. Unplug connector to sensor to see if light goes out. If yes, replace sensor. If no, wire may be shorted.

its have an sender in radiator upper side , replace this sender

This is a COMMON Problem that GM had with the Level Sensor Curciut, And they Never Correctly Addressed it. I Have on ocations Replaced the Sensor and that Corrected the Problem, BUT Other times the Light STAYS ON No matter What, I have tracked the Wires and all I Have Ever Found was the Plug Being FAULTY. So if A NEW Coolant LEVEL SENSOR Does NOT Turn off the Light, try Replacing the PLUG Itself.

The low coolant sensor should be located in the passenger side radiator tank, You need to take it out and clean the sludge off of it for it to work right. Or you can just unplug it and forget about it, the light will go out and it won't cause any problems.

Replace the coolant level sensor.