Hey guys, i have a 2004 Yukon denali xl with the 6.0. I was towing my car on the trailer today and saw trans temps of around 217-220. I have a bullydog tuner that i could put into tow mode but we also have the button on the shifter. Previous owner has a towing shit kit installed that has a firmer first and second shift. The truck also has a trans cooler but i do not know if it is stock. Should i be worried about these temps? i was thinking of mabye changing the filter, and doing new fluid with royal purple. Mabye get a bigger trans cooler with a fan? any advice would be appreciated
2004 Denali Xl Towing?
- Thread starter maresma14
- Start date
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Rivieraracing
Full Access Member
If your denali has the original stock cooler it is tiny! One of the first things I did to my truck was get the biggest cooler they could fit behind the grill and it did wonders for my temps. I also have a fan installed on the cooler but it doesn't really help that much at all!
What is the largest cooler these trucks can fit?
yea it is the cooler size. After i built my trans i went to a 3/4' thick 18x10 cooler. summer heat i stay around 120. and towing i am around 165
yea you will have to use hose clamps and the barb end fittings on the cooler and then adapters to the factory hard lines. But this is no big deal and easy.
Rivieraracing
Full Access Member
Here is my thread I did years ago when I added a fan to my trans cooler!
http://www.tahoeyukonforum.com/threads/tranny-cooler-fan.13542/
And to answer your question, my aftermarket cooler is 11" x 11" and it fits pretty good! Great investment if you plan on towing any amount of the time!
http://www.tahoeyukonforum.com/threads/tranny-cooler-fan.13542/
And to answer your question, my aftermarket cooler is 11" x 11" and it fits pretty good! Great investment if you plan on towing any amount of the time!
Rivieraracing
Full Access Member
Check out the thread I posted up, starting on post #21 it shows you what all I did. To answer your question, I did put the fan on a switch and I barely use the fan anymore since we sold our toyhauler! It doesn't help a ton with cooling off the fluid fast but I think it does help! At least get a big cooler, the biggest you can fit the better!
