I use the same Hellwig springs on my 2011 Chevy Silverado half ton. When we go to Alaska the truck is full with a 17 cu ft chest freezer, fishing and shrimping gear, a 20HP outboard, mounted RV tire and wheel, and a mess of boat stuff. When we come down, the freezer is also FULL of fish and shrimp. Overall, we're around 8100-8500 pounds when we head south, but the truck runs level and smooth. When full, because of how the aux springs are adjusted I find very little difference in the ride from when it's empty. When empty, the truck rides like it just had the OEM springs installed.