I had the same leak, there is a TSB. It is caused by a cross threaded connector. May sure to stress the leak is caused by poor workmanship. My dealer tried to tell me connectors are not covered on my extended warranty. They have to retread the hole to fix it properly.
Mods so far: Ported Throttle Body/Airiad CAI/ Elite Oil Catch Can/Clutch reservoir separation Mod/Subthump/Foot well Lighting/RBG LED behind Grill/LED under Polished Strut Tower Brace/Vinyl Gill Blackouts/Skip Shift Eliminator/DYI Mild to Wild/AAC Plasma DRL's with Plug n Play harness/Blue LED Dome light, white LED trunk and Licence plate light/tinted windows/blacked out side markers and tail lights/Headlight Armor/Clear Bra/splash guards/Black Gorilla Locking Lug Nuts/Plastidipped Bow Ties and rear Tail Light Bezels/Emblem Pros Black Camaro letters/diodedynamics lighted cup holder (SS)