After looking through this whole thread I still have some questions. When I had my firestone ride-rite installed by a dealer I was told to keep 60psi in while fully loaded for my 13 silverado with Nitto terra grappler g2 285/65/18 tires. Long story short after reading through everyone's different setups has anyone found something ideal to run tires and ride-rite air bags at? I recently went on a trip with my front tires at 40 and rear around 45 and ended up getting 8 mpg. Thoughts or suggestions for a loaded 13 Chevy Silverado Hawk? Cheers!