Well, the big vacation of the year was a success. Heaped some major abuse on the Suburban, but she came through without a single hiccup.
Highlights:
Trip duration: 18 days
Total miles: 5,300 (MI-AZ-UT-CO-MI)
Towing miles: 4,900
Most miles towing in one day: 776 miles (Loveland, CO to Iowa City)
Days of 600+ towing miles: 3 (3 more days at 400+)
Pulled the trailer through the Eisenhower tunnel and over Vail Pass on I-70.
Visited 5 National Parks - Grand Canyon, Arches, Canyonlands, Natural Bridges and Rocky Mountain
Scaled Pikes Peak (without trailer ;))
Climbed Trail Ridge Road
Logged ~20 miles of moderate 4 wheeling in Moab - Gemini Bridges and White Rim Road. Not just dirt roads - some frame-scraping.
Very pleased with how the Suburban performed. Only service I did during the trip was an oil change in Moab, after about 2700 miles.
Here's a shot from White Rim Rd, parallel parked next to a 300-foot drop:
2008 Suburban 2500 3LT 3.73 4X4 "The Beast"
2013 Springdale 303BHS, 8620 lbs
2009 GMC Sierra 1500 Denali (backup TV, hot rod)
2016 Jeep JKU Sahara in Tank, 3.23 (hers)
2010 Jeep JKU Sahara in Mango Tango PC, 3.73 (his)