98 Tahoe - Front Air Conditioner Drain Blockage

Hey guys. The woman's ride has an condensed water drain that's blocked or potentially screwed up otherwise. I've crawled underneath the vehicle. I see THREE hoses that go through the firewall. TWO of them obviously go in and around the engine area (compressor and etc.) and the THIRD which is closest to the passenger's door hinges (furthest to the right of the vehicle) goes to a place that I cannot see. I'm ASSUMING that this is the culprit that I'm looking for but for the life of me, I can't see where the !$%%^# it goes to even think about snaking a wire up it to to at the spider web or wasp nest or whatever is blocking the hose. As with most cars, when running normally, a person would see the drain come out of the front passenger side of the vehicle onto the ground. This vehicle?...it's backing up bigtime and now we need to find it fairly quickly before we ruin a motor fan.

Can someone shine some light? I've searched a bunch of this sight...but I'm not finding the answer I'm looking for. Short of dropping the plastic pan inside of the cabin...where can I look for the mystery tube? Thanx!

you should see a small 90 degree rubber hose coming out of the firewall just under the heater hoses....or sometimes this 90 degree part comes off and you'll just see about 1/2 inch of hose sticking out of the firewall. Take a 6 or6 inch piece of wire or maybe a large zip tie and run that up through this hose to unclog it. If its stopped up you will be getting a wet carpet inside on the passenger floorboard.