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Discussion Starter #1
I have a 03 Yukon XL 5.3L, and I am gonna put a tranny cooler on it! Would I hook it up to the top line or bottom line on the radiator? also what size fitting would I need to adapt it to the lines?
 

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HOT AIR BALLOON OWNER
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14,932 Posts
Yup, top is the return for the 60E
 

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Mayhem, Like Me
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3,087 Posts
the size fitting would depend on the cooler you choose....

-Sry Phil.. not meaning to threadjack ya but the bottom line goes out and the top comes back??? Just making sure for my own FYI when I go to hook up my new hoses and new cooler this weekend...
 

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906 Posts
Discussion Starter #6
So unhook the top line, run the line from the radiator to the cooler, than from the cooler to the line I disconnected!
 

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Discussion Starter #7
Today I took a good look at my yukon and I already have an external cooler mounted behind my billet grill, its stock from the factory! Should I remove it and upgrade to a bigger one or just keep it!
 

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Mayhem, Like Me
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3,087 Posts
leave it there... just run another one in series with it.
 
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