[HoosierDaddy]

My "78 used to list to one side after setting a few days.( It did not have air leveling) My mechanic at the time said that was because one side was heavier than the other. My understanding was that the air in the 'bags would leak from the heavy side to the lighter side causing the list. The HWH on my '93 does not go into leveling mode unless I press the "level" button. It appears to me that with the ignition switch in the "off" position no solenoids are energized so the RHC valves are out of the loop. I would say that somewhere in the system air is leaking from one side to the other.