I know this isn't for my Yukon, but the climate control is the same in my Z71...so I thought ya could help...so, let me start by saying, my A/C works great. It's in my 04 Sierra Z71 ecsb with the digital climate control. The A/C will freeze you out and the heat will burn you out. The problem is, it's dripping inside the truck and saturating the passenger side carpet. I first checked the drain tube...it was clear and water was dripping out of it. I noticed the A/C compressor wasn't cycling...figured that was the problem. Checked the charge, it was lie...so I vacuumed it down, charged it up and found the low side port was leaking, so I tightenedd it and it stopped the leak. Now the A/C cycles like clockwork, but it's still doing it. I can run the A/C for hours on a trip and it'll still blow full force with no issues...but after I parked it today and my wife and I went to eat, when we came back out 30 minutes later the A/C was still dripping on the ground. So, what's causing it to freeze up? I really need to fix this before it rots my floor...