99 Regal LS "Low Coolant" Light

My Low Coolant light comes on when I start up, but dissappears after about 10-15 seconds. About 1 month ago I replaced the upper and lower intake gaskets that almost always fail on these cars. This problem just started 2 days ago. No puddles under the car, no funny smells that I can detect. Any ideas what's causing this?

Thank for the help!

Mine had a slow leak, and it was coming from the water pump. It was slow enough that I didn't notice any drips under the car.

ah, just drive it!!