I just installed new air bags for rear suspension of my 2003 H2 hummer and they won't air up. When I pushed the aux air button in the back of the hummer for per say airing up the tires the passanger side air bag started to air up but not the driver side. Now the passenger side bag is all the way extended. What is wrong.

It sounds to me like your compressor got killed. What probably happened is that the airbag got a hole or tiny crack in it so the compressor has to work extra hard because it is like blowing up a balloon with a hole in it. Therefor the airbag killed the compressor. I would recommend going to strutmasters.com and taking a look at our conversion kits. these convert you from the airbag to a powder coated American made steel coil spring that is guaranteed to last the life of the car. I added the link below so you can check it out.
http://www.strutmasters.com/hummer-suspension-parts-s/96.htm I hope I was of some help
Good Luck!!!

Well there is a sensor for ride ht and there is one per side have them checked one is130.00 and the lt is 105.00 per side and did you know you have 2 recalls on your vehicle more info go to collisionrepairadvice.com