Thats close to the combined weight of my uncles new 3/4 GMC Yukon and 28 ft enclosed trailer. The GMC has the 6.0L gasser and he just told me driving through the rockies he had to get behind the semi's a bunch of times and went as slow as 40mph pulling the steep hills. Is this just a lot of weight for a small block? They don't make a diesel for suburbans or Yukon's yet. He cant do a pickup because of trips where he takes 7 people, you can't do that comfortably with that many occupants for thousands of miles. The next best thing is the Ford Excursion but that has a terrible ride compared to his new Yukon's.