Rear air bags on 2005 Buick Rainier

Is it normal for the rear air bags to let all of the air when it sits over night? Every morning the rear end is almost on the ground then takes a few minutes to inflate itself when i start the engine.

Asked by for the 2005 Buick Rainier
2 answers
nope, you have an air leak. take it to a shop and have them check it and give you a bid

yeah you definitely have a leak somewhere in the system