Suspension upgrades

jshupe wrote:
Elaborating on what N-Trouble said: If you go buy the recommendations on Duramax forum, either Bilstein or Fox 2.0s all the way around. Air Bags if you need them, but they do negatively impact your unloaded ride quality. I never felt like I needed to do anything about steering when my truck was in stock form, but a steering stabilizer or Cognito PISK3008 is definitely in order with larger tires.

Personally StableLoads made a tremendous difference in overall stability for me, and they are supposed to be able to be disengaged when not in use. In my case the weight of the hitch (240#) and my toolbox (500# or so) on top of them made disengaging impossible, but if that isn't an issue for you, I'd highly recommend them. They were probably the single most impactful modification I made to my truck, possibly even more than the 19.5" tires. I don't recommend riding around with them engaged when unloaded.

The sway bar on a LML isn't nearly as important as on previous generations. The frame is already one of the stiffest out there. Pulling a 14K+ trailer with a stock drivetrain gives me no issues so I wouldn't mess with any of that unless your warranty is out and you just want to.