I think my air ride suspension is leaking - Help please

[dna]

Over the last 12 months, I find that my battery is dead in the morning about every 3 months. I simply jump the truck, and everything is good again for another 3 months. Its not the battery, since GM replaced it under warranty about 9 months ago. I also took the H2 to GM under warranty two times for this, and each time they could not find any unusual draw on the battery when off - they also confirmed the battery is good.

What I saw today though is different. My drivers side rear suspension/shock was about 3 inches lower than the passenger (really noticed it when I sat in the H2). I think the reat air shock is leaking, which is causing the compressor to kick in causing my battery to leak.

After jumping it today, I raised it back to normal by activating the air suspension and drove it around fro a while - all was good. Then I put the suspension back to normal, and again all was good. So at the moment the air shocks seem fine, though something definately happened yesterday over night.

Any ideas?

Thanks