I have a GMC 2500 HD towing a 2010 3150 with a king pin weight of 2244. I'm doing some trials myself, and originally I tried 40 lbs in the Firestone air bags, and then yesterday I put in 50 lbs and I found the ride pretty smooth. I may try 60 lbs next and see if it makes a noticable difference. I'm also interested in hearing what others use.
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DPAM
2017 GMC Denali diesel, crewcab, 4x4, regular box.
2010 Montana 3150RL- Moving to Montana Package , Hickory Edition Package, wet bolts
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