Air Conditioning Question

I noticed that I get water drainage from the AC system under the truck even though the AC is not turned on. Is this normal? Only thing I can figure is that the AC is automaticly used to control incab humidity?

Yes if you have the defrost on.
Also when the last time you ran it you could still have some water left.
No worry unless you a/c never shuts off. -

I know that surprised me too; the first time I pulled in and had a puddle without the A/C on. I then realized that the last two settings, defrost and Floor/Defrost were use the A/C.
:D