Bob, I attended a certified truck driving school in Alaska the day I brought my 3400 home. The instructor was adamant about installing air bags. The reason was to keep the truck from bottoming out while driving in uneven terrain or backing on uneven terrain. I have yet to install them on my 3500 yet, but will do so soon. SO, they are not just for a better ride. BTW: My instructor was not affiliated with any shop that sold or installed bags. I did have them installed on my 2500 when I had it. I don't say they are a neccesity but probably nice to have items.......Remember, this is my opinion only.....
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