Need support. Just found out my radiator is leaking

iboughtatahoe23 · Feb 25, 2025

BINGO
View attachment 450992
View attachment 450993

So is it safe to say it’s the radiator guys?

Blackcar · Feb 25, 2025

Have you checked drain petcock to make sure its tight and if is check Oring on petcock.

iboughtatahoe23 · Feb 25, 2025

Blackcar said:
Have you checked drain petcock to make sure its tight and if is check Oring on petcock.

It was coming from the radiator. But where is the drain petcock ?

Blackcar · Feb 25, 2025

iboughtatahoe23 said:
It was coming from the radiator. But where is the drain petcock ?

Bottom of radiator.

donjetman · Feb 25, 2025

iboughtatahoe23 said:
It was coming from the radiator. But where is the drain petcock ?

My stock 07 Denali does NOT have a petcock.
I pull my lower radiator hose off to drain it.
Your results may vary?

iboughtatahoe23 · Feb 25, 2025

donjetman said:
My stock 07 Denali does NOT have a petcock.
I pull my lower radiator hose off to drain it.
Your results may vary?

i got a new unit coming in the mail, when I take this one I kinda wanna like smoke test it or something.

Fless · Feb 25, 2025

iboughtatahoe23 said:
It was coming from the radiator. But where is the drain petcock ?

I doubt there is one; if there is it will be near the bottom of the radiator on the driver's side. Not having one probably saved $0.50 so worth it to GM.

iboughtatahoe23 · Feb 25, 2025

Fless said:
I doubt there is one; if there is it will be near the bottom of the radiator on the driver's side. Not having one probably saved $0.50 so worth it to GM.

Well, close to a million gmt900 I think I saw somewhere so almost half a million bucks in savings. That’s crazy when you think about it.

Rocket Man · Feb 25, 2025

EddieC said:
I had a three year old Acura radiator spring a leak. It was nothing to drain and take it out and to a radiator repair shop. It was no big deal and didn't cost much *at the time). They boiled it out, soldered the leak and pressure tested it.
Honestly the hardest part was draining and containing the fluid avoiding contaminating the area but it worked out well.

Ours aren’t repairable. They always leak where the plastic end tanks are attached (glued?) to the aluminum core. It’s super unlikely one leaks in the core where it could even possibly be welded. Better to just buy a new one.

Blackcar · Feb 25, 2025

Fless said:
I doubt there is one; if there is it will be near the bottom of the radiator on the driver's side. Not having one probably saved $0.50 so worth it to GM.

The year truck we are dealing with in this thread doesn't seem to have a drain plug but my 2002 Yukon has one on drivers' side and has a hose on petcock to get fluid by frame horn to drain pan and my 2017 Yukon has one on passenger side but is pain to get to.

Need support. Just found out my radiator is leaking

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