I'm at my wits end, maybe someone has the answer.  I had an antifreeze smell but no visible leaks so I thought maybe the leak was small and evaporated before it could hit the ground.  Upon investigation I found the thermostat and water pump housing both had small leaks, I replace both, pressure tested the system, tightend all the hoses and stuff.  Both the thermostat and water pump housings were dry and no apparent other leaks, but i still get that smell . There is no moisture inside the corkpit or that "sloshing" sound you sometimes hear when the heater core is leaking, but what am I missing?   I am ready to pull my hair out... Any suggestions?

My bet is the heater core IS leaking, but not enough to drip out of the plenum. Have you pulled the carpet back on the pass side to look under it?
The only time I've ever been able to actually smell coolant inside the cabin was either the car had a large leak that was obvious from under the hood, or the heater core was leaking. It's also possible that the hoses going TO the core are leaking slightly, and coolant is running down the tubes into the cabin.
I feel for ya if it IS the heater core...not a job I ever want to do....again...

Why do auto manufacturers seem to build their cars around the heater core?  Seems like half the car must be disassembled to get at them and if you own a car long enough, it WILL leak.  

ouch!!!...i hate those problems that you think is an easy fix and it turns out not to be. poolman if you do yours, i'll let you do mine if it ever starts leaking.

I had a similar smell on my '84. Believe it or not I had a very small leak at the back of the intake manifold. I'm guessing the smell was being pulled in from the fresh air intake in the cowl. Double check the back of the intake cause I believe this was a common problem on '84s. Mine had right around 87,500 miles when I fixed it.

Was it visible? I never thought of that, but I have seen leaks there before, but you can usually see them. Then again, on a Crossfire(or ANY C4, for that matter), it's kinda hard to see anything at the rear of the engine!
Good suggestion!

At first, there was a small discoloration at the back right corner of the intake. The Vette was also using coolant. The coolant consumption got progressively worse, and then I noticed the leak at the back of the intake. When I took the intake off, the back passenger side gasket was almost gone. After I cleaned everything and installed new gaskets, the coolant consumption stopped, and the discoloration did not come back. FYI, there was carbon buildup on my intake, so make sure you clean that out if / when you do intake gaskets.

HAD THE SAME PROBLEM ON MY 91 AND ITS GOT 36000 MI, IT WAS THE INTAKE GASKET, NEVER SAW ANYTHING JUST THE SMELL, HOPE THAT HELPS

any chance you maybe missed a very small "puddle" in betwee nthe injector tops on the intake..I've heard of that being a "common" collection place when gasket is bad.....

guys, thanks for all your ideas, but it was a smal leak in back of the intake manifold.  Thank you JBZ51 for that hint.  All is well now.  Just in time for spring.  Eddie, btw, my club Surf Corvette Club is hosting a show May 15th at Joey Harrisons in Ortley Beach to benefit the Foodbank.  I have details if you or any others are interested.  Frank