Leaking coolant from lines by firewall.

[Petey7383]

Hey guys, new to the forums and hoping y'all can help me. I recently inherited a 2008 Tahoe LTZ from my grandfather. The truck sat for about 1.5years unused while they had a live in nurse. When I picked up the truck I noticed the coolant reservoir was very low, so I refilled it. Fast forward about 1k miles, I started getting a faint smell of coolant through the vents when the air was running. When I checked the tank, it was damn near empty again. I found the leak from this connector next to the firewall, I'm hoping someone can tell what the name of this part is so I can order a replacement and change it. TIA

 

[donjetman]

Heater hose T's.
There have been hundreds of threads here about them breaking and needing to be changed.
Do a search

 

[Fless]

Dorman now makes metal ones, as @mattbta posted:

What did you do to your NBS GMT800 Tahoe/Yukon Today?

Dang! "Doorman" stepping up their game! I was actually thinking of replacing them on my 04 project suburban...I think I'll try these Dorman metal ones. Thanks for posting!

www.tahoeyukonforum.com

GM part numbers in this thread (and many others): https://www.tahoeyukonforum.com/threads/what-pipe-hose-is-this.149975/post-1901529

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

You are already receiving sage advice from the knowledgeable folks on this Forum.

Yes, it is a common issue. These Tees are plastic and get brittle over time, and they eventually fail. You can replace these Tees with GM (only) plastic Tees, or get the Gruven or Dorman metal Tee replacements.


When you change out the tees, be sure to wear gloves, as the firewall insulation is quite aggressive, and your hands will itch for days.