I have coolant but the light and buzzer wont stop on my 87 non-turbo. suggestions?

maybe you should add coolant to the engine block ? check for leaks. if no leaks check your exhaust see if you get a white mist. if your car smells like its burning coolant *sweet smell* you might have an internal coolant seal failure..... that means rebuild time .... let's hope not https://www.nopistons.com/forums/pub...DIR#>/wink.png

Make sure you have all the air out of the system, and that you have coolant in the overflow container.

When I flushed and changed my coolant according to haynes manual, it still buzzed....try taking out the sensor in the top middle of your radiator while filling (as suggested by other folks on here when I needed help), plug it when coolant comes out, the plug the bleeder hole when coolant comes out of there, then fill er up.....that worked for me, no air, no buzz

Make sure too, that the wire to the sensor didn't get unplugged. It tends to come unplugged pretty easily. The sensor is on the top of the radiator. Are you sure your coolant is topped off, with some in the over flow tank?