Hi:
Had my h2 a month ago and some times when it's parked for 3 or 4 days rear lowers down, as soon as I start it goes back up, and normal.
Is that normal? does the air suspension works ok?
Thanks

 

Sounds like you have a leak somewhere,possibly in the line. If you search the forum about air suspension there should be lots of info.

 

I never saw anything like this on any hummer, I agree with dizzy you might have a leak somewhere

Tino

 

Mine's in the shop for the same issue, its actually a fairly common problem when these vehicles age. It's more common in the cadillac escalade, but they've seen about 4 Hummers with the same issue. Usually a problem with the airbag that inflates the suspension, very small hole that causes the entire truck to sink. It's really not a big issue, just weird more or less. There going to evaluate my airbags and see if there's any major tears, otherwise the dealership said its no big deal best left alone.

 

I had this same thing in my old navigator, not serious unless the rip gets big, then you will have to replace the air suspension bag.