External Oil Cooler?

[HomeMadeSin]

The Monroney sticker for my ‘18 Yukon XL Denali says “Cooling auxiliary external transmission oil cooler, heavy-duty air to oil”.

Most of the posts I’ve seen said GM likes to use a portion of the AC condenser for cooling the transmission.

I looked - albeit briefly and in a rush - for an obvious externally mounted transmission cooler in front of the radiator, but didn’t see one.

Can someone clue me in on what I should have and where? Plenty of oil around the spare / PPV battery platform…

Thanks
Z

 

[midnightclubSD619]

I'm curious about this also. I haven't checked to see where it is located. I have seen on other cars they are under the AC condenser attached but obviously separate. I have added an external transmission cooler in addition to the stock cooler to my other cars. Wondering if I should do that to my 2018 Yukon XL.

 

[Marky Dissod]

The auxiliary motor oil 'cooler' isn't really a cooler, it's a heat exchanger, meant ot warm up the motor oil in colder ambient temps.
It's a separate tank on the radiator's driver side. The separate tank on the radiator's rider side is the ATF heat exchanger. (ATF cooler is in front.)

 

[midnightclubSD619]

Thanks for the info. this helped out.