'91 Riviera Rear Air Suspension

[robmaxfli]

Mine has never worked so a couple of years ago I replaced the 2 rear struts with the non-air type (gas).
Since then, a friend of mine was telling me that you can "air up" your old struts even if the air compressor is no longer working. My car is really sagging now and I would like to do something about it. Does anyone have any ideas on how I could replace the struts and air them up permanently?
thanks

[johnd89]

I think that there is an air bag device which sits inside the spring.
it may be cheaper to acheive a proper ride level with some sort of spring spacer.