Sanger,
You don't have air shocks, you have air ride suspension using airbags.
It sounds as if you leveling valves are leaking.
Block up the bus VERY WELL, ( we want to see more of your posts,) because if you cralw under without doing that you cabn become suddenly two dimensional.
Ceawl under the bus with a sprayer bottle full of soapy water and start squrting everything that looks as if it has to do with the airride system. Every line, connection, tank, bag and valve. When you see bubbles, you have found a leak.
More people will have more help for you also, so keep checking back and let us know what you've found.
DallasGO BUSING!