An update I am not chasing a small radiator leak on the passenger side at the bottom. Had to clear up issues or perceived ones with the lower radiator hose and the overflow hose.

Hooked up the radiator cooler in series before the aux cooler should have done that from the beginning.

Drove up to Iowa on a 85+ day and had 205-208 F water temps with a high trans temp of 185 F.

 

Update the radiator has numerous leaks where the tubes and fins go into the tanks. It has at least four and just in case you might question my ability to determine this I took it to a radiator shop.

For my upcoming trip I will running a good stock style unit and I am not leaning towards giving this radiator another chance.

I am somewhat disappointed in the quality and can't recommend it as I have seen Christine is having similar issues.

 

Mine is still perfect, but now I'm wondering if I might be on borrowed time.

 

Hearing this from you is very disappointing to me.

I just checked and ECP offers a lifetime warranty for their radiators for our Blazers. I was not able to take advantage of this because I had mine modified to add an internal oil cooler. If you have not yet contacted them about the leaks, I'd suggest you do.

The warranty statement is on the page for the radiators for our Blazers.
https://speedcooling.com/product/che...cooling-tubes/