The 2001 in the driveway has 188,000 miles. Last summer pulled a trailer, combiined weight of 7,340 from Iowa to Spokane,yes over the mountains. Then to Colorado Springs, the top of Pikes Peak and back to Iowa.
Then just for good measure pulled a trailer, combined weight of 6,935 to Albuquerque from Iowa and back.
No problems, just a little slow over the mountain passes.