Rear-end lowers after being parked on Hummer H2

Average mileage: 97,306 (47,300–150,000)
4 model years affected: 2003, 2005, 2006, 2007
19 people reported this problem
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problem details
After my H2 is parked awhile (mostly overnight), I will find the rear end has "dropped" approximately 6" as compared to the height of the front end. The rear end will regain its height once the engine is turned on. This happens intermittently.
2003 Hummer H2 150,000 mi,
I get a "service air suspension" message, the compressor runs either constantly or not at all when the message is displayed. This doesn't happen all of the time, just randomly. Sometimes it completely drops the rear air suspension and sometimes it's just fine.... Drives me crazy!
I was the second owner of my 2003 Hummer H2 and the air started leaking from the rear compressor or tank about one month after buying the vehicle, I have tolerated it until now ( about one year now ) because now I have to stop and restart it just to get 25 miles now! Any ideas what I should do next like a conversion to shocks and springs or repair/replace the expensive part ?
Rear drops when parked. Noticeably more on drivers side. Looking for the solution.
I have a 2003 hummer h2 while in park the rear loose air and it sit really low and it takes about 20 min to rise back to normal for me to drive..I could hear the compressor turn on when I start the hummer but its taking for ever to go up from the rear. What could be the problem
2003 Hummer H2 93,000 mi,
Over night the back end of my h2 hummer drops down but after driving during the day it stays the same height of the front . Until I get up in the morning it happens all over again.
2003 Hummer H2 80,000 mi,
air susp. pump runs all the time
2005 Hummer H2 122,252 mi,
can't fix every time I take it in and get something new done it happens again every time I park it goes all the way down to where there's like an inch between the tire and the back don't know what to do frustrated 2005 SUT Hummer
2003 Hummer H2 125,578 mi,
I have a 2003 hummer h2 while in park the rear is loosing air and it takes for ever to get it to rise to normal what could be the problem
2006 Hummer H2 118,000 mi,
air pump run all the time, rear drops down when shut off
rear air lowers over night and we can push button in truck and raise back up and then next day it is down again
2006 Hummer H2 81,900 mi,
Same thing over night parking and it sitting in the ground