96 park avenue low coolant warning light

:confused: I have a 96 Park Avenue. 130000 miles, recently had low coolant light show up on dash, radiator and reservoir had fluid in it, reservoir was a little low when hot, but not much; took it to mechanic, checked cooling system, pressurized it at 15lbs overnight, held pressure fine.

Warning lite now comes on periodically, I check the fluid levels, all seem okay. Can the sensor go bad? (I would think this is a possibility) where is it, is it easy for novice to change or do I need the experienced or pro to do it?

Thanks, seems to be a little of an annoyance at the moment, but keeps me worried, I don't want to overheat this puppy.

The coolant level sensor is on the side of the radiator were the coolant cap is. it might not be connected all the way u could check that. Mine broke and feel out of the radiator when it was cold outside. It cost $50 dollars from NAPA, and is the same as the OE sensor. Its very easy to change ,takes about two minutes, just unclip and twist, but radiator fluid is gonna leak out.

Try and bleed the air out at the thermostat housing air bleed nut.I had trouble with my light coming on at times:I bled the air out and have not had any problems yet-It is a cheaper fix too.

Thats good advice. I know someone who had a bonneville and had a leak in the radiator. basically most of the coolant leaked out. They refilled it but it was still overheating but not enough. I told them not to drive it because they need to bleed the system, they didn't listen and basically cracked the head. so now it goes no were.

Thanks for the info on bleeding the air, I'm a novice, help me with where, how, when is enough, whatever else I would need to know to do this.

It is in the thermostat housing located at the end of the upper radiator hose that connects to the engine.It is a brass screw with a slot that needs turned counterclockwise to be opened and let air bubbles escape.Unscrew it untill you see bubles or coolant and leave it open 20 seconds or so to alow the air to escape untill you see just coolant trickle from the bleed hole.