My 95 Aurora's Service-engine-soon light will only flash when car is crancking to start, instead of staying on for 10-15 seconds and going off.

I took the car to dealer to have the light fixed. They not only didn't fix it, since I got the car back, everytime car makes a little move or I turn the switch, the shock-level control compressor starts to pump loudly and won't stop for 4-5 minutes.
I know it's probably my shocks leaking air or bad compressor but can I disconnect the compressor to get rid of the loud noise of it every minute? if yes, how?:disappoin

you can remove the fuse from under the back seat fuse box.. its the one going by the map inside the lid marked elc ...electronic level control

That fuse also disconnects instrument panel, there must be another way to disconnect ELC

Go under the car and unplug the wire to the compressor. There is a electric connector to the compressor motor. This will stop the compressor from coming on but if you have a leak in the shocks you may droop down in the back.