How do you know if you have the max trailer package? I went to the silverado site to build one and I just see one option. I pulled my build sheet and it just shows a towing package.Did you get the max trailer package? The '14s & '15s use a Hotchkiss 9.5 axle and electronic away control with the max tow package. If this is what you bought, I'd say you have an really strong platform to work from. If you feel too much sway, go for a weight distribution hitch instead of the airbags.
I trailer my boat every weekend in my '15 Tahoe and can attest to the drastic difference between the previous gen. frame, axle, suspension setups and what are being used in the new models.
Wow landscaper, you could tow your boat and mine with that beast. When I look back through this thread I am amazed at how many of you have such tow beasts