I had a 2011 GMC Denali XL with the 6.2/6 speed.
I have a 2014 Jeep Grand Cherokee with the 3.0 EcoDiesel.
The GMC was used as a secondary tow vehicle for my 7000 pound boat. I've used the Jeep a couple of times to tow the same boat.
I love my Grand Cherokee. Might be my favorite vehicle I have ever owned. The 3.0 with the 8 speed just drives great. While I haven't pulled my boat through the Rockies, I was never left wanting for power driving I76 (relatively flat). I know it wouldn't pull up the hills as fast as the Yukon, but I think it would do fine. The GM 3.0/10 speed should be a better combo than what I have.
If GM would have offered the 3.0 diesel in a Yukon/Burb when I was buying at the end of last summer, I may very well have ended up in another GM SUV vs the Expedition that I bought.
