Generally there is one reason for the light. The airbags are leaking.
I think you are confused calling your car a GVR4. No 4wd ever came with air suspension. Could you post some pics of your car?
Also where are you? What market was your car?
If you have the air struts still on the car and the light is coming on.
1, does the car sit lower than normal?
2, Is it making funny noises?
Mine made a hell of a racket whern the compressor gave out, also it sat low when the airbag on one strut went. The read light is an indication somepart of the system is not happy.
Hope this helps,
Rich