Just FYI.. we've been pulling our trailer for about 4 years now with our GMC Yukon 1500, from San Diego up into the Canadian Rockies, all the way up the west coast, last year we did Colorado. She's always been under powered and every hill is a white knuckle event both up and down. Last year she gave us trouble in Colorado and over heated half way up that nightmare pass.. I can't remember the name.
Bottom line:
We have 3 young kids and go to some pretty challenging places
This is why I'm asking the question New or Used Diesel :-)
If we were just towing a couple of hours down the road then we wouldn't even be considering a different vehicle and would use the Yukon till it died totally.
Thanks.