GM Yukon XL Denali Transmission Temps
My main tow vehicle is my RAM CTD, but when we take the RV as well the truck has to pull my 7000 pound boat. So then we use my 2011 Yukon XL Denali to tow the Malibu. It has always run hot - both...
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I have a couple of questions, are these temps sustained, that is for hours on end, or just at the times climbing the grades? Are you using any kind of custom grill shell or grill replacement?
If these are not sustained temps it will not hurt a thing. Thinking that it is comes from using the old Dex III fluid. Your truck has Dex VI which can withstand higher temps for short bursts far better than Dex III could.
If you are using a grill shell or grill replacement it could be impeding the air flow.
Al GMs from 2006 and up use Dex VI, a synthetic blend.
It is since is already has the auxiliary cooler
It has electric fans
I agree, with that kind of weight and towing in mountains, it would not hurt.
If these are not sustained temps it will not hurt a thing. Thinking that it is comes from using the old Dex III fluid. Your truck has Dex VI which can withstand higher temps for short bursts far better than Dex III could.
If you are using a grill shell or grill replacement it could be impeding the air flow.
time2roll wrote:
I would be changing the transmission fluid to synthetic if not already done.
Al GMs from 2006 and up use Dex VI, a synthetic blend.
time2roll wrote:
Next I would be checking that radiator if it was the largest available.
It is since is already has the auxiliary cooler
time2roll wrote:
Maybe change out the fan clutch.
It has electric fans
time2roll wrote:
Lastly I would install the extra capacity transmission cooler.
I agree, with that kind of weight and towing in mountains, it would not hurt.
