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.

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1 answer
Sounds like leaking air lines for rear air shocks allowing the shocks to bleed down and then bottom out. Fix it quick.