I've found out thru my course of nearly 40 years of driving awesome trucks, is it's best to leave them as designed. Put on bigger tires goes without saying of course.
2019 Chevy Silverado 3500HD SRW Duramax
LTZ+ - Z71 Double Cab / 4x4 / Graphite Metallic
Gooseneck/5th Wheel Package / B&W Tow & Stow
Leveling Kit / 285/75R18 Falken Wildpeak AT3s
LoadLifter Ultimate Plus 5000 Air bags
AFE 5 Stage Air Filter / EDGE Insight