Last year I moved from SC to WA and towed my JKU. I was just around 9K lbs. I have a 2013 Silverado 1500 with the 5.3L. The truck did better than I thought but struggled big time on big hill climbs and I had my trailer brakes cranked all the way up for the trip down. I made the 2500 mile trip but I would have definitely preferred using my 7.3 or 6.0 PSD I used to have. Since then I've towed a couple other vehicles and didn't have too much of a problem. But I wasn't loaded down with household goods either. I think you will be ok as long as you take it easy. Also look into Timbren bump stops. Cheaper than air bags and they made a huge difference.