I bought my 2003 H2 a year ago and two months later I left the country for 4 months. I had an issue with the air bags on the rear suspension deflating. I am about to leave again for 8 months this time. I was wanting to know if there are any tips, tricks, or suggestions to do to my hummer wen storing it that long. I did not know if it was hard on the air bags to leave them deflated that long. Thanks!

 

It shouldn't hurt the air bags. I would fill the tank with something that doesn't have ethanol in it and then add some fuel stabilizer such as Star-Tron Enzyme fuel treatment.
Wash and wax it. Stuff some steel wool in the tailpipe if there is a chance for critters to get in.

 

Remember to use a battery maintainer