Im with him, it took me forever to find the small leak on my 05 and it turned out to be the heater hoses. Mine was actually leaking from a very small crack on the plastic fittings that clips over the metal lines from the heater core.
Junkyard 5.3 milled heads 200 shot, built 4l80e with circle D 4000 multi disc converter
EPS cam 23x/23x 600/603 112lsa
KP 6 link bagged with Accuair E-Level http://www.nitrousexpress.com/