I started out with lower Stable Loads on my GMC 2500HD, they were awesome reducing sway. I almost always tow a 16' trailer with a side by side ATV (loaded with cooler, firewood, 20 gallons gas, etc), so I added the heavy duty Timbrens. Absolutely no complaints with either addition.
2014 Wolf Creek 850SB
2012 GMC Sierra SLT 2500HD 7,220# Truck/10,400# Camper Fully Loaded