Cab bags are different then suspension bags. Cab bags were made to support the weight of the cab and are small so they will be hard all the time. Suspension bags are bigger and sized to pick up a load, so if you are empty you will be able to push then in a little . If your loaded they will be hard as a rock. Cab bags are loaded at all times and are hard at all times.
I have a 2014 Cascadia when my kingpins were shot the truck was shaking and bouncing in the front. Changed shocks had it aligned but it wasn't until I took it to a shop that specializes in suspension that they pinpointed the problem. I felt it thru the steering wheel and had strange tire wear on the steers.
My truck has a mark on the frame you measure from the top of the axle to the Mark is your height the adjustment on my truck is where the rod connects to the rear suspension there are 12 holes at an angle moving the Rock from one hole to the other hole will adjust the height of the truck
Just a quick eyeball way to check to see if it looks like it's closed is your tire should be roughly about 1 inch lower than the frame rail if there's if it's higher than that the airbags are overinflated it's a frame is even with tires or below the top of the tires and they're under-inflated