Rear Air Suspension Problems

[lmajor]

Mine only releases air sometimes. It happens when I park and turn off, I can hear air coming out. When I come back it will be sagging. Only once while driving did the service air come on and it sounded like the compressor was continualy running. It stopped after several minutes of driving. I checked the bags and I don't hear or see any leaks. It doesn't make sense that the bags would be leaking because once they start to leak they are not going to seal themselves back up and not leak other times. Any ideas?

[DRTYFN]

Originally Posted by lmajor

Mine only releases air sometimes. It happens when I park and turn off, I can hear air coming out. When I come back it will be sagging. Only once while driving did the service air come on and it sounded like the compressor was continualy running. It stopped after several minutes of driving. I checked the bags and I don't hear or see any leaks. It doesn't make sense that the bags would be leaking because once they start to leak they are not going to seal themselves back up and not leak other times. Any ideas?

I'm going through the same thing right now. Sometimes they leak and some times they don't. If I pump them up before turning it off it'll stay inflated indefinitely.

[lmajor]

This makes me think that it is not a leaking bag but something like a valve or sensor etc. My compressor was replaced to the newer style back in 04 and seems to be working fine. Any thoughts?

[timgco]

Why don;t you guys just take out the stock bags, add factory or better yet aftermarket 2" taller coil springs. Than add a set of adjustable firestone bags. you can get teh in cab controller and you can raise lower for increased weight or added height when wheeling. Those bags are more reliable than teh stock bags and inlfate/deflate way quicker. ...just a thought.

[IRA51]

Originally Posted by timgco

Why don;t you guys just take out the stock bags, add factory or better yet aftermarket 2" taller coil springs. Than add a set of adjustable firestone bags. you can get teh in cab controller and you can raise lower for increased weight or added height when wheeling. Those bags are more reliable than teh stock bags and inlfate/deflate way quicker. ...just a thought.

100% CORRECT AND A GOOD WAY TO GO .

[lmajor]

Thanks for the suggesstion but I'd rather keep it stock. I am at 81k now and have not had any issues so I would rather just figure out the problem. Any ideas?

[timgco]

Originally Posted by lmajor

Thanks for the suggesstion but I'd rather keep it stock. I am at 81k now and have not had any issues so I would rather just figure out the problem. Any ideas?

Go to your dealer and have them figure out. GM had progarm updates to the earlier models. I was one of the first 03's to have my air bags go....and if you're in the middle of bumfu*#, you are SOL. I had to cram a 2x4 in both sides and had a nice 4 hour ride back to Denver since it was a Sunday and could not get a flatbed anywhere.

My reccomendation, pay the dealer thier service fee and see if any updates are available. you have some high miles on that H2 and things are going to start to go. This "I'm at 81K without issues" may be the start of replacing that whole system one by one. Teh aftermarket way is much cheaper/easier to go than replacing stock....unless the budgett isn;t a factor. ...my 2 cents for what it's worth.