Hello, I just bought an 05 Avalanche and have found that it leaks pretty bad. I have googled and YouTubed for hours on end... I have came to the conclusion that it's most likely the a\c condensation. i have checked all the seals that I have seen mentioned around the internet, and it hadent rained in a good long while (2 or 3 months) it did get a good bath just after I got it but it's been about three weeks since and Ive dried it out. The issue Im having is that I don't know where to look for the condensation drain line... I read that there is one at the right rear wheel well, I find a tube but it has a cap on it... If anyone has any information that could help please share it with me..pictures would be great..... Thanks in advance