air loss

I have a 2003 Buick Rendezvous (178K miles) with rear auto ride height. (Original owner. Replaced rear air shocks a few years ago.) The air pump runs non-stop and never lifts the rear. I manually added air to the system, near the rear shocks at a schrader valve, and the rear shocks raised...

All Tires loosing Air pressure - have been since I got the car new Dealer has looked at the tires/Rims and says they can not find anything wrong with them They reset the system and the Tech put 40PSI in each tire - I called the service department about that mistake I didn't let the air out to...