Need an air suspension experts (or at least someone that knows a bit about it)

[dna]

My air suspension has had a leak somewhere for the last year. It has been sporatic and when it does leak it used to leak very slow. At first you would never hear it, but eventually it got worse, and now it leaks 75% of the time and when it does it goes totally soft within 20 seconds and you totally hear a loud major leak.

The odd part is that if I hit the raise button to bring the H2 to its max height, it never (NEVER) leaks. I can leave it that way for weeks and it will not come down. If I have it at normal height, it will only leak 75% of the time - why is it OK 25% of the time? Also of the 75% of the time, it almost always starts to leak after about a minute of turning off the engine.

So here are my questions:

1) does it sound like my bags?? I really don't think so because if they had a hole, would it not leak 100% of the time regardless if in normal or extended height? Same question if it is a line - why is it sporatic???

2) my compressor is getting old and tired. It still works but I notice it is taking longer to raise the truck when the bags go soft. Until I diagnose and fix it I want to keep the truck in the extended-height mode regardless if I reach the 60km/h speed where the computer wants to bring them to normal height. By keeping them at max height, it will buy me time. Someone on this post said the easiest way is to disconnect the wiring plug on the compressor. I looked at the compressor housing and there are two wiring plugs - one directly inside the metal housing and then one just outside. Which one do I disconnect. Also I tried to disconnect each one but I can not figure out how to disconnect the plug. GM makes all sorts of different 'locks' on their plugs. Anyone have some knowledge of how to disconnect these (I'd hate to but more force on them and break one of the plastic plugs).

Thanks