Coolant on the floor
Took the Camaro out for a short cruise last night, nothing rough, maybe a half hour averaging 55 mph maybe I hit the high 60's at some point. Got home put her in the garage shut her off and heard a funny hissing sound. Wasn't sure what it was looked around didn't see anything. Started it back up real quick because I wanted to see the temps (oil, engine, trans). All temps seemed normal but it didn't idle even so I shut it off. After I shut it off the hissing was gone. This morning I get up to go to the gym and see some coolant on the floor, not much by any means but some. Looked under the hood and it looks like it came out of the top of the radiator because I can see some on some of the fans and such.
Imagine I need to take it to the dealer to get it checked out but just thought I'd get some thoughts from some of you one what you thought may be going on, or things to check.
Any input appreciated. Thanks.