There is a small external radiator/cooler attached to my main radiator with 2 rubber hose lines . I know that the metal lines on the main radiator are oil cooler and trans cooler lines. Can anyone tell me what this other one may be used for?
Thanks

 

Most likely for your a/c.

 

Look to see where the hoses go? It sounds like it may be an aftermarket add-on transmission cooler.

 

your right it's an external radiator but it's for you transmission cooler lines for your tow kit .

becuase your blazer has a tow kit dont mess with it it help keep your transmission cooler with it. it for towing help keep the transmission ALOT cooler. then normol

if you look at your radiator by your battery you will see that they conn. to your metal transmission line's. one the other side by the air box you have your motor oil lines .

so just think of it as two radiator cooler just for your transmission oil .. hope this helps