Hello, I’m trying to put a Keldermans 1.5” rear spacer under my factory air bags to level truck out after front leveling kit. I put truck in transport mode and jacked up the frame. Drivers side air bag lifted right up and put the spacer in no problem. The passenger side acts like it is still aired up. What do I need to do to get this bag to dump it’s air? Any help will be greatly appreciated. Thanks!