low coolant message on

i have a 1999 olds aurora,and the low coolant message is on.i have fill the coolant all the way to the line,when the engine is at the operating temperture,still saying low coolant,had the car scanned,no fault codes.It was low,but now its full,is there a way to reset the light like there is to reset when the oil gets changed?any help would be great,thank you

Sounds like a bad sensor in the coolant tank. When mine came on simply adding coolant to the system turned out the light.