rear shock clunking noise on 2003 Cadillac DeVille

after installing rear air shocks,there is a "clunking" noise heard.When the air pump comes on and raises the rear,it goes away but comes back in just a few minutes,until the pump raises the rear again.

Asked by for the 2003 Cadillac DeVille
Sounds like leaking air lines for rear air shocks allowing the shocks to bleed down and then bottom out. Fix it quick.