location of A/C drain tube on 2008 Buick Lucerne

I have looked under my car for the drain tube and cannot locate its position. I have water coming from under the dash and my carpet both front and rear are getting soaked. I think Imy have a stopped up drain.

Asked by for the 2008 Buick Lucerne
Although it may be difficult to see/find, check the firewall area for that drain tube. There isn't alot of room to see (let alone get your hands in there) in the engine compartment near the firewall.
You have a plugged up cowl drain. If that fills up with water, you'll get the water-all-over-the-floor problem. You may also have to remove the panel(s) that cover the cowl (where fresh air enters the heat/a/c system below the windshield) and clean out any debris that has accumulated there and open up the drain to make sure it does its job.