How do you reset computer on 1998 caddlic Seville sls?

To reset the computer on a 1998 Cadillac Seville SLS, disconnect the negative battery cable for about 15 minutes to clear the stored codes and reset the system. After reconnecting the cable, start the engine and let it idle for several minutes to allow the computer to recalibrate. You may also want to drive the vehicle for a short distance to help the system relearn driving patterns. Always ensure you have any necessary radio or security codes before disconnecting the battery.