rear suspension airbag question ??( maybe dumb not sure )

[Hummertech]

I was starting to answer your question with what the hell are you talking about, but then I read it a 3rd time and realized you are reffering to the rear air springs. I thought you were talking about air bags that go off in a crash.
Tell your buddy there is a reason he doesn't fix cars for a living, and that's because he doesn't know what the hell he's talking about.
Tell him to go back to McDonalds and cook up some fries.
You can remove both rear air springs without taking the rear end out. You depressureize the rear air springs one of 2 ways. remove the air line, or with a scan tool.