High Temps 2011 Yukon XL Denali

[mikeyss]

I pulled the trigger on a Mishimoto radiator, B&M deep tranny pan and ended up with the derale tranny cooler. My Hoe has the puny dual 5 blade fans, but I do have the K5L code, any advice on aftremarket cooling fans? Or are these OEM ones 700W? I was going to take your suggestion on the 7/9 esky fans, but not an electrical geek?
Thanks

You don't have the puny dual fans... Those are the dual 700W motors and are as good as the older 7/9 700W setup. I have both setups, my 06 Denali has 7/9 700W setup, and my 09 Tahoe has the 5 blade rimless K5L fans that you have, and both setups are really good. I think the 5 blade rimless ones suck in just a little bit more air though. I have videos of both setups on hi somewhere.

 

[Monz11]

You don't have the puny dual fans... Those are the dual 700W motors and are as good as the older 7/9 700W setup. I have both setups, my 06 Denali has 7/9 700W setup, and my 09 Tahoe has the 5 blade rimless K5L fans that you have, and both setups are really good. I think the 5 blade rimless ones suck in just a little bit more air though. I have videos of both setups on hi somewhere.

Thanks, I'm trying to keep my upgrade budget at 10K, so this helps!

 

[Doubeleive]

ya the k5l is the 700w they came in 5 blade or 7/9 blade rimmed

 

[Foggy]

I just received my new fan assembly: TYC 622210 from amazon.. Supposed to be the 7/9 blade set up.. As mine were replaced by PO
with a 7/7 blade aftermarket fan. I DO have the HD cooling/towing. So I really wanted to make sure I had the 7/9 Blade Assembly.
Well, the fan that showed up in the TYC box is a 7/7 set up.. So same as I already have.
Has anyone found a replacement true 7/9 set up ???? I'd really like to have max cooling as supposed to, esp with my mods and towing

 

[mikeyss]

These are the ones I got for my 06 Sierra Denali

 

[mikeyss]

That's odd that they only gave you the 7/7 blade one.

 

[Foggy]

Well Crap, I must have a mis boxxed one or something.. Maybe a returned
item that someone put a 7/7 blade in.. I'll return it (if they pay shipping) and
re order from either amazon or RA .. Hopefully I'll get the correct 7/9

 

[swathdiver]

Well Crap, I must have a mis boxxed one or something.. Maybe a returned
item that someone put a 7/7 blade in.. I'll return it (if they pay shipping) and
re order from either amazon or RA .. Hopefully I'll get the correct 7/9

I've seen that before from Amazon!

 

[1BADI5]

The 235 is the engine coolant. I tow a trailer to San Diego that weighs about 6000-7000 lbs and my Denali hits 235 on freeway with slightest uphill grade. I’ve read on this forum that the engine runs hot and that is normal but it always freaks me out . I’m not sure what the Denali weighs fully loaded. I will eventually buy a diesel to tow but have to keep using the Denali in mean time.

I’m trying to keep the wear and tear down on engine and I figured extended trips towing and running engine at 235 would not be good.

Also, I don’t remember exact trans temp but it was definitely closer to 230-240 on the hills. I was thinking if I lowered the trans temp my engine coolant would run cooler as well. Am I way off?

I’ll review that thread you linked as well. Thanks!!

With those trans temps you transmission is not going to last very long............heat kills them quick.

1) Tru Cooler Max 40k trans cooler
2) B&M aluminum deep trans pan - holds an extra 2 qts of DEX6 - fins for cooling too
3) Trans service - new fluid and filter........DO NOT power flush it

 

[avalonandl]

Dexron 6 is designed for up to 260 but I agree that runin 235 is hotter than I like. For the engine coolant try a "wetting" agent, might bring that down.