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I installed an OEM cooler about 2 years ago. I wasn't convinced that it was needed, but it couldn't hurt. The reason I picked OEM is that it was designed to fit existing mounts in the truck. Also, I don't like Dorman for anything that I need to depend on to get me somewhere. I'm sure if you search these forums, you will find posts about the part number and installation.

AS for fluid, I don't run expensive fluid but I do a complete change every 2 or 3 years, same with brake fluid.
 

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Found my trans cooler in my maintenance log. It's a

ACDelco 15821239​
I don't know if it will fit your truck without any mods, but likely any mods would be pretty easy.
 

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Found my trans cooler in my maintenance log. It's a

ACDelco 15821239​
I don't know if it will fit your truck without any mods, but likely any mods would be pretty easy.
Bad post on my part. That was NOT the power steering cooler. Sorry for the misleading post.
 
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