My Hummer H2 model 2007 SUT has rear suspension issue. It sometimes leaks air and the back side of the vehicle goes down. Sometimes it retains its pressure. An error is also showing that rear suspension needs service. On software the attached error is showing. Can someone please guide me where to get it fixed in Islamabad.
Probably rear air suspension wiring issue. Can explain the symptoms ur facing. If there isn't any leak which can be checked using the scantool if all works fine than its just a wiring issue.
AOA i think you need to get your rear suspension serviced as i think it would be airmatic suspension and with time it disturbs even is the old cygnus as well.
Check with humsafar autos (motorway chawk)