Hi I have a 1999 Cadillac Seville air suspension system is not working, can I just change to regular shocks?

Not really a good idea, the whole suspension system is engineeered around the special struts.

[quote=maxwedge;6870272]Not really a good idea, the whole suspension system is engineeered around the special struts.[/qu

Why do you say that?

I'd look at either Arnott Industries or Strutmasters for replacment struts and/or shocks. I've used Strutmasters parts on my '94 Deville, which bypassed the electronics. It seems that Arnott's still use the electronics, whereas Strutmasters is a passive system.

http://www.arnottindustries.com/part_CADILLAC_Air_Suspension_Parts_yid6_pid39.html

http://www.strutmasters.com/SearchResults.asp?Search=1999+Cadillac+Seville