Radiator leak 2013 Tahoe 200,000mi

[HughW]

Have a 2013 Tahoe 200,000 mi. Had radiator leak about 6 oz over a couple days. I tried Bars stop leak in the plastic tank and it didn’t work so t got a bottle of K-seal . This time I loosened the bottom hise and drained radiator and mixed the K-seal with antifreeze and loosened the upper hise and filled the radiator . It seemed to work for a couple days . After a 1000 mile round trip , it had a small leak . Seems the copper granules circulating would prevent leakage. Should I try something else , maybe a different stop leak or get a new radiator ? I can’t see exactly where the leak is coming from without taking all the plastic parts off but it’s on the driver side of radiator

 

[Geotrash]

Have a 2013 Tahoe 200,000 mi. Had radiator leak about 6 oz over a couple days. I tried Bars stop leak in the plastic tank and it didn’t work so t got a bottle of K-seal . This time I loosened the bottom hise and drained radiator and mixed the K-seal with antifreeze and loosened the upper hise and filled the radiator . It seemed to work for a couple days . After a 1000 mile round trip , it had a small leak . Seems the copper granules circulating would prevent leakage. Should I try something else , maybe a different stop leak or get a new radiator ? I can’t see exactly where the leak is coming from without taking all the plastic parts off but it’s on the driver side of radiator

New radiators are relatively cheap and easy to replace. Yours is past due at 12 years and 200K. Denso is the OEM manufacturer.

 

[Foggy]

Make sure to flush all that leak stop shit out of your system !!!!!!!!!!
It will clog up heater cores and create a mess of goo inside the cooling system
OE radiators are aluminum with plastic side tanks...
12 years and 200K ! You got your $$ worth

 

[swathdiver]

Have a 2013 Tahoe 200,000 mi. Had radiator leak about 6 oz over a couple days. I tried Bars stop leak in the plastic tank and it didn’t work so t got a bottle of K-seal . This time I loosened the bottom hise and drained radiator and mixed the K-seal with antifreeze and loosened the upper hise and filled the radiator . It seemed to work for a couple days . After a 1000 mile round trip , it had a small leak . Seems the copper granules circulating would prevent leakage. Should I try something else , maybe a different stop leak or get a new radiator ? I can’t see exactly where the leak is coming from without taking all the plastic parts off but it’s on the driver side of radiator

Get a new GM OE radiator. You keep fooling around and get that motor too hot, you'll be needin' more than stop leak for a blown engine.

 

[Joseph Garcia]

I concur with the above posts => replace the radiator. Both ends are plastic, and it is only a matter of time before it ruptures, and you will most likely be a long ways from home (that's just the way that Murphy works).