I have a 2005 Monterey with air leveling.  For quite some time (maybe from day 1) I lose air overnight.  When it loses air, the driver front side also drops.  Yesterday my neighbor and I crawled under the front.  We sprayed soapy water on the front 6 pack, the connection to the air bag, the horn relay and the step relay and the air bag itself.  No bubbles that we could see.  So today I got thinking about the HWH air leveling system maybe leaking somewhere.
Has anyone ever chased down this problem.  Do we even know where the leveling air lines are located?  I only saw one line going into the bag.  This is driving me nuts.
Dennis