What did you do to your NNBS GMT900 Tahoe/Yukon Today?

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ls1frc

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It needs more diagnostics, but it looks cracked to me. No leaks from hoses. No coolant stains starting from any hoses.

But this area of the radiator is saturated orange and i see fluid underneath.

Smelled coolant for weeks.

20201224_100834.jpg 20201224_100812.jpg 20201224_100803.jpg
 

Doubeleive

Wes
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Mine was cracked, so I went with Mishimoto. After 9 months, it's already cracked and leaking...
the local radiator shop here, that has been here for decades... told me the aluminum radiators always leak they had never seen one that didn't and they didn't recommend any brand but they will sell one if you really want it lol.
 

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Wes
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Man, those crimped radiators have always been problematic with the seeping end tanks. I remember problems with those back in the early 90s. Some shops had a crimp tool and would just re-tighten the crimps on it.

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I went thru that a couple times, had it re-crimped 2-3 months later, leaking again
 

89Suburban

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I know I will be chastised for this but that stop leak aluminum powder shit works good. I used it my whole life never had any ill effects from it for small weeps or leaks.
 

89Suburban

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Might be a little hard to get in there with the aluminum spool gun nozzle

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Oh I figured it would have to be pulled out either way to actually find where it is leaking. I got my first MIG aluminum setup last year so I am trigger happy with it lol.
 

alpha_omega

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So basically any tire shop should be able to fix it pretty easily/cheaply?

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Yes sir. If you live anywhere it gets cold enough that requires salt on the roads it won’t be long before your wheels end up bleeding worse or the chrome starts flaking like others have mentioned. I got tired of filling mine up whenever the temp dropped, so I ditched the 22” chromes and went aftermarket.
 

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