Air ride suspension problems

I had a similar issue, that was a leak at the connection between the compressor and accessory output in the cargo area.

Suspension problem
2003 GMC Envoy 6 cyl Two Wheel Drive Automatic 60000 miles

This is an odd problem for me in that the problem is not persistent. We have the load-leveling package with the air suspension. What is happening is that we'll come back to the vehicle after it's been sitting, and find the rear air bags completely deflated, with the rear end completely lowered. But after we put the keys in the ignition, it will inflate just fine and ride just fine. The compressor doesn't have to turn back on (to re-inflate) while we're driving it. It seems to hold air.

Now the odd part. We can leave the vehicle sit for DAYS, and it doesn't deflate a quarter inch. Yet other times, we can come back in a hour and it's completely deflated. I have NEVER seen, or heard it losing air. But it obviously does, as I said it can completely deflate in an hour. Originally, this happened once or twice a week. Now, it's about 5-7 times a week, so it does appear to be getting worse. I'm thinking of putting a webcam on it overnight so I can see if it's a gradual or fast dump of pressure.

I can't understand what could be wrong where it would retain air indefinitely sometimes, but other times completely deflate, like the system purged air.

I've done a quick check for leaks, and didn't find anything, but didn't have much room under there. I plan to lift it and try again. But I need more ideas.

Help!

That describes my car exactly! About a year ago, I had the pump replaced, and I don't want to do that again. It is a sporadic problem, but it is occuring more frequently. And I don't think it is a leak because it does not happen all the time. Did you find a solution?

This is the same problem I have with my 2002 Envoy

Suspension problem
2003 GMC Envoy V8 Front Wheel Drive Automatic

I think the problem is the rear air suspension. How long is the manufacturer warranty on air bags?

When I arrive in morning the car is sitting down with air shocks deflated, but not always, just every now and then, seems to be getting worst.

Only the rear two shocks let the air out, but sporadic, what is bcm, and no there is no visible damage. Have had three mechanic try and find out what the problem is and they could not. Also cruise control is sporadic. Is there some computer/board that could be malfunctioning?

I am having the exact same problem with my envoy air suspension that has been previously mentioned on the forum - the air bags will deflate after one hour or after two days but reinflates when you start the car! No pattern at all - and it seems to bother my neighbors - my car looks like a clunker when in the deflated mode.

My air bags keep deflating when the vehicle sits for over 2 hours. Yesterday it actually lost pressure while I was driving it. What would cause the bags to lose pressure? Are the bags, air line, or the compressor leaking?

I have the same problem. My bags deflate when car sits but not every single time. I discovered that there is a leak. I have caught my truck deflating and can hear a hiss noise as the air escapes. I looked under the truck and looking at the bags, the bags look old and may have a hole or two in them maybe not big enough to see but u can see a lot of wear on my bags. When I start my truck up it inflates to normal height. I also ran into driving my truck on a long trip and the bags letting the air out as I drive. This is due because the compressor keeps putting air in and air leaks. The compressor can only run for sooo long before it overheats and needs a rest before it pumps again. What I had to do was pull over for awhile turn off the truck and let it rest so the compressor can turn on again and pump the air. As soon as I can clear out my garage and pull my truck in and lift it up and look under it I should be able to tell where the leak of air is coming from.

Air suspension will not inflate to proper height after being replaced how many fuses in system seems to be lifting w/ left bag only. This is at a firestone dealer and they can, t quite get it right. Thanks