The color of oil. LoL!

It's oil, or it looks and feels just like oil. Which is why I am confused, because I wouldn't expect oil to leak into the cab of the truck.

 

If there aren't any external oil leaks on the engine, that isn't the problem.

Does the A/C work?

Is the oil black? (it comes in many colors......)

 

Can you get a picture of this tube your talking about, or were the oil is coming from ?.
That might help us help you in figuring out whats going on.

 

Yes A/C works.

No, the oil is still clean. (less than 500 miles has been put on the truck since we last changed the oil)

 

Yeah, I'll get some pic's when I get home.

 

Here is where the oil is coming from.

Under the dash passenger side...


I had to reach way up inside to find this residue for this pic, the truck hasn't been driven since Monday, when my son posted I cleaned it out. You can see, not only does it look like oil, but it feels just like oil as well. So I am fairly confident when I tell you it's oil...
EDIT:Also the napkin is not stained from the leak, it was just convenient for me to place there just in case to keep the carpet from getting stained, so don't read into that.:EDIT

 

I don't think its oil, it's probably coolant. With dirt.... Failing heater core.

You could taste it, coolant is sorta sweet......

 

That actually makes sense. Coolant is slippery as well.

 

my oil is hot pink!

 

There is no possible way for engine oil to get into the heater/ac ducts. But as was said above, a leaking heater core is more than likely your problem. When the leaking coolant mixes with the dust and dirt that gets into the ducts it will turn brown, and coolant also has an oily feel to it.