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jlrosine's avatar
jlrosine
Explorer
Jun 29, 2017

2005 Yukon XL Denali tranny whine while towing/braking?

Hi all. Yesterday I gave my 2005 Yukon XL Denali a pretty heavy tow test, and it maybe failed a little but maybe not? I'm trying to figure out if anyone else experiences this with their GMC trucks wit...
Tow Vehicles
carringb's avatar
carringb
Explorer
Jun 29, 2017
X2. You're either loosing fluid viscosity, or its foaming. Or both. And neither are good.

You definitely need a full fluid exchange at a minimum, and if temps are still that high with new fluid, than maybe consider another cooler.

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