2002 Yukon 5.3L Heater core hose quick connect leaking. The quick connect confused mess of plastic lego parts is leaking right where it push locks onto the core fitting coming out of the firewall. It's the one hose that has the Tee in it (which I presume takes off and goes to the rear heater core. Question is what is the name of the quick connect part I need? Or is there an o-ring kit to repair it? If you push pull on the hose you can feel it's rather loose and when you pull on it coolant pours out of the fitting. Advice please? Thanks

Actually, those connectors were a mistake, courtesy of General Motors. A simple fix is to get rid of the plastic connector. Ok....where your two pipes come out of the heater core at the firewall...sometimes they are so brittle, they will come out with relative ease. Sometimes you need to break them off in pieces, so that all you have is metal pipe sticking out. That stub out is 3/4in. if memory serves. Which ever size it is, measure it and go to Home depot or your hardware store, plumbing section. Get a brass nipple. Say its 3/4s....get the nipple with threads on one end, smooth pipe on the other. The whole thing is about three inches long. believe it or not, that nipple will thread it self into your metal stub out coming out of your heater core like it was made for it. If it makes you feel better, swab your threads with water-pump RTV silicone gasket maker, or equivalent, then, with your water-pump pliers, line it up square, and thread it in slowly. It will fit like a glove! This retro-fit is so popular, a lot of auto parts stores actually keep these "nipples" behind the counter for just such an occasion. I did the same thing on a 1999 1/2 chevy 4x4. That was 8 years ago....and its still in there today.

Theroadisalover

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