air bag
I installed Air lift air bags on my 1995 2500 CTD when it was new. It has carried a Alpinlite 9. 5 truck camper and pulled a 8000# cargo trailer for about 120,000 miles. I used the individual air switches to level the camper at campgrounds and it worked very well. I also used them to level the truck in strong crosswinds. I never had a bag failure,pump failure or even a broken air line.
The only thing I had to learn is not to over level the truck under load. VERY GOOD PURCHASE!!