I was looking at a camaro for a friend his water was leaking and he already plugged off the heater core thinking that.. but it continued to leak. I know there is a drain for the AC on these it must be clogged i figured where are the easiest places to access this to shoot some air up it and fix the problem

 

I hear ya, been having the same issue. I haven't figured anything out on it yet, only that it just leaks with the A/C on. I'll let you know if I figure anything out.

Maybe somebody else will chime in too.

 

Under the AC evaporator there is a condensation catch tray with a hose leading under the car. Dirt and assorted crud collects in the tray and plugs up the hose. You need to clean them both out. If you just clean the hose, the dirt in the tray will plug it up again.