Opinions on air bags for 2015 HD 3500 to carry my Lance 855s

I wouldn't add a thing till I loaded the TC and make a short trip down the road . Then is the time to add bags or a after markets suspension help to level up IF the rear suspension needs it.

I had to bag one truck when I hauled a TC. It was a one ton DRW 4x4 that sit level unloaded. Adding my 10.5 Fields TC made the squat a couple of inches but it was enough to cause handling issues. I then added bags and fixed the squat and handling. The orher DRW trucks were 2wd models that sit azz end high any way. My TCs simply made the 2wd trucks level .

X2 with what Reddog1 said. I would go ahead and get the in cab controller if and when you purchase the bags.

I added Air Lift bags on the rear of my '05 Chevy 3500 SRW when I had a bumper pull TT. Seems the tongue wt. was 1400# plus 1000# in the bed. Bags eliminated most of the bounce and had a few inches of leveling adjustment. Without the load, the truck seemed to ride better too. You could also benefit by having a minor amount of front/back and left/right leveling. Don't mess with the auto-leveling addition...My pump malfunctioned and pumped one side to 100psi...almost had an accident.

Just saw your topic line! I wouldn't buy them if you don't need them.

What kind of truck do you have?

Personally, I prefer to have them. It can be argued they are not needed, but that depends on your expectations. I prefer to raise the rear of my truck up after it squats its 2-3 inches after loading the TC. It aims the headlights where they should be. I can use them to level the TC when camping. I can also adjust the ride comfort to a great degree, empty or loaded. No fixed suspension can do those things.

To really take advantage of their value, you have to experiment with the air pressure on your particular rig. I definitely plumb bags separately, with the filler valves under the dash on the driver side. I eventually added an in-cab controller to mine.

Wayne