I am in the market for a replacement for my 01 Yukon XL and the Denali has been recommended for, among other things, the Hydra-Matic 6L80 6-speed auto transmission. The 4-speed in my recently totalled Yukon lasted 130K without a problem and I have some hesitation to try a new transmission without hearing some feedback.

Anyone out there have problems with or good things to say about this transmission?

Thanks in advance,

Steve